男 is one of the most commonly used Japanese kanji, and it also has a lot of special readings in addition to the standard onyomi and kunyomi readings.
ONYOMI 音読み
おとこ otoko お o
KUNYOMI 訓読み
ダン dan ナン nan
Examples
あんな男見ても胸くそが悪い。I can’t bear the sight of him.私は男だ。I’m a man.俺は自由な男。I’m a free man.私たちは男です。We are men.彼は頼もしい男だ。He is a man to be depended on.彼は小柄な男です。He has a small frame.昔、若い男がいた。A long time ago, there was a young man.私は注意深い男だ。I’m a careful man.私は男の姿を見た。I saw the figure of a man.