entries → 勁兒
TSUMUGU · TOCFL C1 (est.) · 詞
勁兒 word · TOCFL C1 (est.)
勁兒 ＝ 勁 ＋ 兒
· jìnr
noun (colloquial) — strength, energy, oomph; spirit, knack; (with 個/股) a streak, a mood

字源 FORM — what the parts do

勁strength, energy (力氣)jìn
兒the spoken -r ending (兒化)rno meaning of its own — it rounds the syllable off in speech
勁兒，力氣的勁，兒化的兒。
關 · Related
勁頭jìntóuthe same colloquial 勁, with 頭 instead of -r力氣lìqìthe plain word for physical strength