TSUMUGU · TOCFL 1 · 字
室
室 ＝ 宀 ＋ 至
ㄕˋ · shì
noun — a room
字源 FORM — what the parts do
宀義a roof
{zh,ch,sh}Izhì → shì — zh stepped to sh inside {zh,ch,sh}
Under the roof (宀), 至 — an arrow struck into the ground, arrival — gives the sound and the sense both, zh stepped to sh. The room is where you arrive and stop: 教室、臥室、辦公室.
故事 STORY — a scene to remember it by
走了一整天，跨進屋頂（宀）下，行李一放——到（至）了。
A whole day on the road; through the door, under the roof (宀), the bags set down — arrived (至).
字源記憶法
意 · Meanings
(本義)室— the inner room — arrive, and stay
→教室— the classroom常用
→臥室、浴室— bedroom, bathroom
⇒辦公室— the office
(本義) original meaning · → ⇒ each arrow = one more step of extension