This is the 4428th most frequent Japanese word.
坊主
"坊主" (ぼうず) refers to a Buddhist monk or priest; it can also mean a shaved head or be used colloquially for young boys.
坊主 is used to refer to a Buddhist monk here, indicating a religious figure.
その坊主はお寺で修行しています。
That monk is practicing asceticism at the temple.
坊主 refers to a close-shaven hairstyle, resembling the typical haircut of monks.
髪を坊主に刈り上げました。
I got my hair shaved to a buzz cut.
坊主 is used colloquially to refer to a young mischievous boy.