entries → 沸
TSUMUGU · B1 (est.) · 字
沸 character · B1 (est.)
沸 ＝ 水 ＋ 弗
ㄈㄟˋ · fèi
verb — to boil, seethe, bubble up

字源 FORM — what the parts do

水義waterwritten 氵 on the left
弗聲fú — gives the sound
FTfú → fèi — the vowel and tone shift off the donor
Water (氵) churning up, bubbles breaking the surface — to boil. 弗 carries the sound, shifted from fú to fèi. From the rolling boil: 沸騰, to seethe; 沸點, the boiling point.

故事 STORY — a scene to remember it by

鍋裡的水（氵）翻上來、泡泡爭著冒——滾了。
The water (氵) in the pot heaves up, bubbles racing to the top — it boils.
字源記憶法
意 · Meanings
(本義)沸騰、滾沸— to boil, seethe常用
→沸點— the boiling point常用
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
拂fúsame 弗 phonetic kept at fú, brushing with 扌 (hand); 沸 takes 氵 and shifts to fèi for the boil