• 半分はんぶん — half portion
• 前半ぜんはん — first half
• 後半こうはん — second half
• 半月はんげつ — half moon
• 半端はんぱ — incomplete / odd / unfinished
• 半袖はんそで — short sleeves
• 半信半疑はんしんはんぎ — half in doubt / dubious
• 半はんライス — a smaller portion of rice

Commonly appears in time expressions (like "half past"), quantity (like "half price"), and in sports to divide a game into halves. It can also express incompleteness or something midway through.

ケーキを半分はんぶんに分わけた。
I divided the cake in half.

試合しあいの後半こうはんが始はじまった。
The second half of the match has started.