entries → 納悶
TSUMUGU · TOCFL 5 (est.) · 詞
納悶 word · TOCFL 5 (est.)
納悶 ＝ 納 ＋ 悶
ㄋㄚˋ ㄇㄣˋ · nàmèn
verb — to be puzzled, to wonder uneasily

字源 FORM — what the parts do

納to take in (接納)nà糸 the thread; 內 nèi gives the sound
悶stuffy, depressed (鬱悶)mèn心 the heart shut behind 門, a closed door
納悶，接納的納，鬱悶的悶。

故事 STORY — a scene to remember it by

心（心）關在門（門）裡，想不開。
The heart (心) sits shut behind a door (門), turning a question it can't solve.
字源記憶法
關 · Related
鬱悶yùmènthe same 悶 — pent-up gloom