• 博士はかせ — doctorate holder
• 博物館はくぶつかん — museum
• 博覧会はくらんかい — exposition, fair
• 博学はくがく — erudition
• 博愛はくあい — philanthropy

博 is a phono-semantic compound: the radical 十 (ten) is used in the structure, and the phonetic component 尃 suggests sound and nuance. The kanji implies vastness, learning, and richness in knowledge, hence its use in academia and public exhibitions.

彼かれは 歴史れきしの博士はかせです。
He holds a doctorate in history.

博物館はくぶつかんで 恐竜きょうりゅうの化石かせきを見みました。
I saw dinosaur fossils at the museum.

🎧 Listen to the Japanese and English readings of this kanji.