Woman, Female
noun
When a kanji is alone and doesn't have any okurigana (hiragana attached to the kanji) it's usually going to take the same meaning as the kanji it comes from. So in this case, you know that this word means woman. But watch out! Using 女 on its own can often come off as blunt and disrespectful, especially in casual chats. We’ll introduce you to neutral equivalents soon!
おんな
When a word is a single kanji with no okurigana (hiragana attached to the kanji) it tends to use a kun'yomi reading. You didn't learn the kun'yomi reading when you learned the kanji itself, so let's use a mnemonic to remember it: Think about how this woman is onna (おんな) roll. She's winning left, right and center. She's unstoppable. Yep, she's truly onna roll!
バーに三人の女がいる。
There are three women at the bar.
「く + ノ + 一 = 女」なので、女のニンジャのことを「クノイチ」というんです。
Since "く + ノ + 一 = 女," a female ninja is called "kunoichi."
あの女は、とても力のある女スパイだ。
That woman is a very powerful female spy.