Several parts combine into one character.

喉 is a phono-semantic compound: 口 (mouth — meaning) + 候 (hóu, "to wait / await" — phonetic). 候 lent its sound, 口 carried the meaning. Composite reading: "the inner passage of the mouth = throat." A textbook example of how phonetic radicals work in Chinese characters.

Korean reading "hu." 喉頭 (hudu, larynx — medical), 喉音 (hueum, "throat sound" = a guttural consonant in phonetics), 咽喉 (inhu, throat — formal medical compound), 喉痛 (hutong, throat pain). All medical or technical Korean — the everyday Korean word for "throat" stays Hangul (mokgumeong).

Mandarin hóu, 2nd tone. 喉咙 (hóulóng, throat — daily speech), 喉头 (hóutóu, larynx), 咽喉 (yānhóu, throat — formal/medical). 喉咙 dominates everyday Mandarin — a Chinese speaker with a sore throat says 我喉咙痛 (wǒ hóulóng tòng), almost never the bare 喉.

Japanese on-reading コウ (kō) — 喉頭 (kōtō, larynx), 咽喉 (inkō, throat — medical). Kun-reading のど (nodo) — 喉 (nodo, throat — daily), 喉が痛い (nodo ga itai, "my throat hurts"). Japanese has a folk-medical compound 喉風邪 (nodo-kaze, "throat-cold" — a cold that began with throat soreness) that anchors an entire shelf of over-the-counter Japanese pharmacy products.

Memory aid: mouth (口) plus the phonetic 候 — the inner mouth-passage where breath waits before becoming voice.