鍥而不捨

To carve or engrave something; to cut or chisel away at; to chop and sever.

A conjunction connecting clauses or phrases; indicates addition, contrast, or a causal relationship; also used to indicate a change of state.

Function word; no; not; un-; negative prefix; used to form questions or emphasize a statement; sometimes used for rhythm.

To give up; to abandon; to discard; to let go; to leave; to give alms; to donate.