Half
noun
You have half a part. Half a part is still half, right?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
半分に切る
to cut into halves
半分にする
to halve something, to split something into halves
半分になる
to be halved, to be split in half
半分づつ
half each
半分こ
sharing equally
半分ちかく
close to half
人口の半分
half the population
人生の半分
half of one's life
のこりの半分
the half that's left
この本を半分までよみました。
I’ve read halfway through this book.
このクラスの半分は女子です。
Half of this class are girls.
ざっくり日本人の半分ぐらいはニンジャです。
About half of the Japanese are ninjas.