焦
ショウ, こ.げる, こ.がす, こ.がれる, あせ.る

char, hurry, impatient, irritate, burn, scorch, singe

JLPT1 G7 S12 F973

隹 here a variant form# of 鳥 bird + 火 fire → bird scorched over a fire, shrinking in the process → *scorch*; *scorching hot* → *burn*; *singe*; *char* → *fretfulness*; *anxiety*; *haste*; *hurry*; *impatience* (← heart on fire with anxiety). Also, *crave*, *pine for*, *be dying to* and *deep in love* (← be burning for/to).

[Full Kanji Etymology List]