TSUMUGU · TOCFL 3 · 詞
研究
ㄧㄢˊ ㄐㄧㄡ · yánjiū
verb — to research, to study; noun — research, study
字源 FORM — what the parts do
研to grind; to study deeply (研究的研)yán石 shí (stone) + 幵 jiān (sound) — grinding stone; by extension, deep study
究to investigate thoroughly (研究的究)jiū穴 xué (cave) + 九 jiǔ (sound) — going to the bottom of the cave; to exhaust a question
研究，研究的研，研究的究。
故事 STORY — a scene to remember it by
石（研）磨到盡頭，鑽進洞底（究）——非弄清楚不可。
Grinding the stone (研, stone 石 under 幵) to nothing, going to the cave floor (究, cave 穴 + 九) — nothing less than clarity will do.
字源記憶法