琢磨(たくま)

polish and refine

切磋琢磨(せっさたくま)

improve oneself through mutual competition

彫琢(ちょうたく)

carving and polishing

琢磨(たくま)する

to polish and refine

玉(たま)を琢(みが)く

to polish a gem

琢成(たくせい)

refinement and accomplishment

琢玉(たくぎょく)

polishing a gem

琢刻(たっこく)

carving and polishing

若手研究者(わかてけんきゅうしゃ)たちは互(たが)いに切磋琢磨(せっさたくま)している。

The young researchers are honing their skills through friendly competition.

彼(かれ)は技(わざ)の琢磨(たくま)を怠(おこた)らない。

He never neglects the refinement of his skills.