TSUMUGU · TOCFL 2 (est.) · 字
熟
熟 ＝ 孰 ＋ 灬
ㄕㄨˊ · shú
adj — cooked, ripe; familiar, practiced
字源 FORM — what the parts do
孰聲shú — meaning and sound bothwho? in modern use, but here its old self: 享 (a food offering) beside 丮 (a gripping hand) — food prepared
灬義fire — four dots of flame under the pot
孰 shú gives both the sound and the core sense — once it pictured a food offering (享) held in a hand (丮), food made ready. Later 孰 drifted off to mean "who," so fire (灬) was added underneath to pin down the cooking. Cooked, then ripe, then known by heart: 熟食、成熟、熟悉.
故事 STORY — a scene to remember it by
鍋下四點火（灬）慢慢燒，手裡（孰）的食物——熟了。
Four dots of fire (灬) burn low under the pot, the food in hand (孰) — done, cooked through.
字源記憶法
意 · Meanings
(本義)熟食、煮熟— cooked, done常用
→成熟、熟透— ripe, mature常用
⇒熟人、熟悉— familiar — known until it is "ripe"常用
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
孰shúthe phonetic standing alone — 孰 now means "who," 熟 adds fire to hold the cooking