熟 means “ripe, mature”

じゅく · juku

Also: mellow, ripen, acquire skill

Kun'yomi (Japanese reading)
うれる
On'yomi (Chinese reading)
ジュク

JLPT N1 · Taught in grade 6 · 15 strokes

The story

Fire (灬) under 享 and 丸: picture an offering rolled round and set over the flame until it is cooked through. 熟 is ripe and done: the 半熟 egg on ramen is soft-boiled, 未熟 is green and untried, and the compounds you study are 熟語, "ripened words".

Used in 半熟 (hanjuku, soft-boiled/half-cooked), 熟語 (jukugo, kanji compound), and 未熟 (mijuku, unripe/inexperienced)

More from Flavors & Brews

Learn 熟 and more kanji free on Fuji Learning · All kanji

Readings from KANJIDIC2, © EDRDG, CC BY-SA.