entries → 不懈
TSUMUGU · TOCFL C1 (est.) · 詞
不懈 word · TOCFL C1 (est.)
不懈 ＝ 不 ＋ 懈
ㄅㄨˋ ㄒㄧㄝˋ · bùxiè
adj — unflagging, tireless, unremitting

字源 FORM — what the parts do

不not (不是)bù
懈to slack off (鬆懈)xiè
不懈，不是的不，鬆懈的懈。
關 · Related
鬆懈sōngxièthe slack 懈 itself — what this word refuses堅持jiānchíthe holding-on the unflagging effort amounts to