融
ユウ, と.ける, と.かす, あきら
dissolve, melt
JLPT1 G7 S16 F481
虫 here an abbreviated form# of 蟲 swarm + 鬲 tripod cooking vessel/cauldron → stir a swarm of objects in a cooking vessel (compare
毒
and
熟
) → *melt*; *dissolve*.
[Full Kanji Etymology List]