Limbs

Phonetic-semantic compound: 扌 (hand-radical) + 旨 (intent / purport, providing phonetic value). The encoded meaning: "the part of the hand that points / indicates intent" → finger. Functions as both noun (finger) AND verb (to point at / indicate). Identical across 繁體 / 新字体 / 简体.

Mandarin: zhǐ, dipping 3rd tone. 指 covers finger, pointing, and indicating: 手指 (shǒuzhǐ, finger), 指甲 (zhǐjia, fingernail — neutral final tone), 戒指 (jièzhi, ring — "guard finger"; the everyday word for ring), 指挥 (zhǐhuī, to conduct / direct — used for orchestra conductors AND political/military leaders), 指南 (zhǐnán, "to point south" → guide / compass), 指南针 (zhǐnánzhēn, magnetic compass — Chinese invention!), 指出 (zhǐchū, to point out).

Japanese: on-reading シ (shi) — 指示 (shiji, instruction / direction), 指揮 (shiki, command / orchestra-conducting), 指紋 (shimon, fingerprint), 指南 (shinan, guidance — formal, also the name of various 指南書 guidebooks). Kun-readings: ゆび (yubi, finger) and さ.す (sa.su, to point at). 指輪 (yubiwa, ring — "finger-circle") uses both kun-readings.

Note the everyday verb-noun pair: 指で指す (yubi de sasu, "to point with a finger") uses the SAME character twice, once with each reading — once as noun (ゆび) and once as verb (さす). This double-use of one character with two readings in a single phrase is uniquely Japanese.

The historical 指南車 (shǐnánchē, "south-pointing chariot") was an ancient Chinese mechanical compass — invented around 200 BCE. The compass's name preserves 指 (point) + 南 (south) literally.

Memory aid: hand + purport = the digit that indicates / points.

Compound character: an upper element depicting a shoulder profile + 月 (the flesh-radical, indicating body part). The encoded meaning: "the fleshy part of the shoulder profile". Identical across 繁體 / 新字体 / 简体.

Mandarin: jiān, level 1st tone. 肩膀 (jiānbǎng, shoulder — the everyday word, the colloquial 肩膀 has stronger connotation than 肩 alone), 肩负 (jiānfù, to shoulder / bear responsibility — used metaphorically for taking on duties), 并肩 (bìngjiān, side by side — "shoulders together"), 双肩包 (shuāngjiānbāo, backpack — "double-shoulder bag"). The metaphor "to shoulder responsibility" works identically in Chinese and English.

Japanese: on-reading ケン (ken) — 双肩 (sōken, both shoulders / the burden one shoulders), 強肩 (kyōken, strong throwing arm — sports vocabulary). Kun-reading かた (kata) is the everyday word — 肩 (kata, shoulder), 肩こり (katakori, shoulder stiffness — a famously prevalent Japanese complaint), 肩書き (katagaki, job title — "shoulder writing", from medieval armor inscriptions), 肩身が狭い (katami ga semai, "shoulders narrow" → feel small / embarrassed).

肩こり (katakori, shoulder stiffness from desk work) is one of the most-mentioned Japanese health complaints — Japan has an entire industry of massage shops, 整体 (seitai) clinics, 湿布 (shippu, medicated patches), and even shoulder-massage bras. The word is essentially untranslatable in casual English.

The expression 肩を貸す (kata o kasu, "lend a shoulder") means to support someone — same metaphor as English "shoulder to lean on".

Memory aid: shoulder profile + flesh — the body's arched joint.

Phonetic-semantic compound: 月 (flesh-radical) + 要 (important / essential, from earlier batch — providing both phonetic value and semantic suggestion). The encoded meaning: "the most essential part of the body" → waist / lower back. The character literally says: "this body part is what holds you together." This etymological reading reflects East Asian medical wisdom: lower back health was considered foundational to physical strength. Identical across 繁體 / 新字体 / 简体.

Notice the recursion: 要 (the previous character meaning "important") originally meant "waist" itself (from a pictograph of hands on hips) — when the meaning generalized to "important / essential", a new character 腰 was created (with 月 added) to recover the original "waist" meaning. So 要 and 腰 are sibling characters preserving etymological history: one became abstract "essential", the other kept the body-part meaning.

Mandarin: yāo, level 1st tone. 腰 (yāo, waist), 腰部 (yāobù, lumbar region), 腰带 (yāodài, belt — "waist-band"), 腰围 (yāowéi, waist measurement), 弯腰 (wānyāo, to bend at the waist), 腰果 (yāoguǒ, cashew — "waist-fruit", from the kidney shape). 弯腰 (bowing at the waist) is the everyday Chinese verb for the formal Japanese-style bow.

Japanese: on-reading ヨウ (yō) — 腰痛 (yōtsū, lower back pain — extremely high-frequency Japanese health complaint). Kun-reading こし (koshi) is the everyday word — 腰 (koshi, lower back / waist / hip), 腰掛ける (koshikakeru, to sit down / lean — formal verb). Japanese folk wisdom and martial arts traditions emphasize 腰 as the body's power center — 腰の力 (koshi no chikara, "strength of the lower back") in budo / sumo / kendo.

The Japanese 腰痛 (yōtsū, low-back pain) is treated as a major lifestyle ailment — desk workers in Japan are especially prone to it, and 腰痛体操 (yōtsū taisō, low-back exercise) is widely practiced.

Memory aid: flesh + essential = the body's most essential part — the lower back / waist.

Phonetic-semantic compound: 月 (flesh-radical) + 宛 (to bend, providing phonetic value). The encoded meaning: "the bending part of the body" → arm. Identical across 繁體 / 新字体 / 简体.

Mandarin: wàn, falling 4th tone. In modern Mandarin, 腕 typically refers specifically to the WRIST, while the colloquial word for "arm" is 胳膊 (gēbo). 手腕 (shǒuwàn, wrist OR figuratively "skill / artifice / political maneuvering"). 大腕 (dàwàn, "big wrist" → top star / heavyweight in entertainment industry — modern slang). So the Mandarin sense narrowed to "wrist + skill".

Japanese: on-reading ワン (wan) — 手腕 (shuwan, ability / skill — same compound, similar meaning to Mandarin), 鉄腕 (tetsuwan, "iron arm" — strong arm / pitching arm; also the title of Astro Boy 鉄腕アトム). Kun-reading うで (ude) is the everyday word and broader than Mandarin's 腕 — 腕 (ude) covers the WHOLE arm in Japanese, not just wrist. Compounds: 腕時計 (udedokei, wristwatch — "arm-watch"), 腕前 (udemae, skill / ability), 腕白 (wanpaku, mischievous boy — irregular reading).

The Japanese 腕 carries a metaphorical sense of "skill / ability" alongside the physical body part — same as Mandarin and Korean. 腕がいい (ude ga ii, "the arm is good") means "skilled / talented", used for craftsmen, athletes, doctors. 腕が上がる (ude ga agaru, "the arm goes up") means "skill improves".

The metaphor "arm = skill" runs across CJK languages, paralleling English idioms like "to flex one's arm".

Memory aid: flesh + bending = the body's flexible arch — the arm.

足 stacks two parts: a knee (口 element on top) and the foot itself (止 below). 止 alone means "stop / foot" — its oracle bone form was a footprint. So 足 is essentially a leg drawn from kneecap to sole. Identical across 繁體 / 新字体 / 简体.

As a radical, 足 marks anything done with the foot: 跑 (run), 跳 (jump), 跟 (heel/follow), 踢 (kick), 路 (road), 跨 (stride), 距 (distance — "foot apart"). When 足 sits on the left it slightly slims; the inner footprint stays visible.

The character carries a second, looser meaning: "enough / sufficient". The metaphor runs through phrases like 满足 (mǎnzú, satisfied), 不足 (bùzú, insufficient), 足够 (zúgòu, enough), 知足 (zhīzú, content) — possibly from the idea that a well-trodden path is "enough" for getting somewhere. Knowing both senses is essential because they appear in everyday speech equally.

Mandarin: zú, rising 2nd tone. 足球 (zúqiú, football/soccer — "foot ball"), 满足 (mǎnzú, to be satisfied), 不足 (bùzú, not enough), 手足 (shǒuzú, brothers — "hands and feet").

Japanese: on-reading ソク (soku) in 不足 (fusoku, shortage), 満足 (manzoku, satisfaction), 補足 (hosoku, supplement). The kun-reading あし (ashi) is the everyday word — 足 (ashi, foot/leg), 足音 (ashioto, footstep), 一足 (issoku, "one pair" — counter for shoes/socks). 足りる (tariru, to be enough) — the "sufficient" meaning surfaces here.

Memory aid: knee on top, footprint on bottom — a leg drawn whole.

手 is a hand with five fingers spread, drawn flat. Oracle bone forms show the splay of the digits and the wrist arc clearly. Identical across 繁體 / 新字体 / 简体.

Like 水 and 火, the hand has a critical positional variant. When 手 sits on the left of a compound character, it flattens into 扌 (the "hand radical"). Once you spot 扌 you can predict the meaning involves a manual action: 打 (strike), 拍 (clap), 握 (grasp), 投 (throw), 拉 (pull), 推 (push), 持 (hold), 掃 (sweep), 拭 (wipe). This is one of the highest-yield radicals in the script — easily a third of common verbs use it.

Mandarin: shǒu, dipping 3rd tone. 手 covers physical hand and metaphorical "agent / specialist" alike: 手机 (shǒujī, cellphone — "hand-machine"), 手表 (shǒubiǎo, wristwatch), 握手 (wòshǒu, handshake), 高手 (gāoshǒu, expert — "high hand"), 选手 (xuǎnshǒu, contestant), 杀手 (shāshǒu, assassin), 歌手 (gēshǒu, singer). The "hand = practitioner" metaphor runs through every CJK language.

Japanese: on-reading シュ (shu) in 手術 (shujutsu, surgery), 握手 (akushu, handshake), 選手 (senshu, athlete). The kun-reading て (te) is the everyday word — 手 (te, hand), 手紙 (tegami, letter — "hand paper"), 上手 (jōzu, skillful — "upper hand"), 下手 (heta, unskillful — "lower hand"), 切手 (kitte, postage stamp — "cut hand", an old printing-block term).

Memory aid: a hand turned palm-down, the four fingers visible. The horizontal strokes are the fingers; the long vertical sweep is the arm.