Several parts combine into one character.

男 is a textbook compound ideograph (会意字 / huìyìzì): 田 (field) on top + 力 (strength/power) on the bottom. The encoded definition is "the one whose strength works the field" — Bronze Age agricultural China defined "man" by labor role. Identical across 繁體 / 新字体 / 简体.

力 here is itself a pictograph of a plow or muscled arm. So 男 is literally "field-worker", a one-character snapshot of an entire economic system. Note that the radical classification is 田 historically but in modern dictionaries 男 is filed under 田 (field) — the working component, not the powering one.

Mandarin: nán, rising 2nd tone. 男人 (nánrén, man), 男孩 (nánhái, boy), 男生 (nánshēng, male student), 男朋友 (nánpéngyou, boyfriend), 男子汉 (nánzǐhàn, "man's man / true man" — a strongly masculine compliment). Pairs with 女 in 男女 (nánnǚ, men and women), 男女平等 (nánnǚ píngděng, gender equality).

Japanese: on-readings ダン (dan) in 男性 (dansei, male), 男子 (danshi, male), 長男 (chōnan, eldest son), 美男 (binan, handsome man); ナン (nan) in 男女 (danjo, men and women — note the irregular reading: dan, not nan), 次男 (jinan, second son). The kun-reading おとこ (otoko) is the everyday word for "man" — 男 (otoko), 男前 (otokomae, handsome — "front of a man"), 男坂 (otokozaka, "man's slope" — the steeper of two paths up to a temple).

Memory aid: 田 (field) above, 力 (muscle) below. The character literally reads "field-power".