Human, Human Being
noun
The person interval. Just think of different intervals each with a different type of species. The raccoon interval... the dog interval... the person interval... they are the humans.
にんげん
This is a jukugo word, which usually means on'yomi readings from the kanji. Since 人 has two on'yomi readings, and the reading of 間 is a bit of an oddball, here's a mnemonic to help you: Did you know that the humans who work for Nintendo are all called Genji (にんげん)? Yep, that's right, every single human ever hired by Nintendo is called Genji, without exception.
人間は主に水で出来ています。
Humans are mainly made of water.
これは人間用のヘアドライヤーですよね？
This is a hair dryer for humans, right?
人間社会で自立して上手くやっていくのに不安が有ります。
I have concerns about whether I can be independent and do well in human society.