Man
noun
The kanji and the word are exactly the same. That means they share meanings as well.
おとこ
Since this word is made up of a single kanji, it uses the kun'yomi reading. Here's a mnemonic to help you to remember it:
There is a man. Think of the manliest man you can. He works in an auto shop. As a child, he was an auto 子 (おとこ), working at the auto shop from an early age. This turned him into a man very quickly.
Like other mnemonics that aren't lined up quite perfectly, your goal here is to get close enough to remember the true reading. Step, step, step, jump!
あの男はだれですか。
Who is that man?
今日は男友だちとパチンコを打ちにいくよていです。
I plan to go play pachinko with my guy friends today.
知らない男と花火大会で意気投合した。
I developed quite a rapport with a man I didn't know at a fireworks show.