aestuo

I am in agitation or violent commotion, move to and fro, writhe, rage, toss, boil up, heave.
(of fire) I burn, blaze, rage.
(of the effect of fire) I am warm or hot, swelter, glow, burn.
(of water) I rise in waves or billows, surge, whirl, seethe.
(figuratively) I burn with desire, am agitated or excited, am inflamed, fret.
(figuratively) I vacillate, hesitate, am in doubt or undecided.

Affix from Latin aestus (heat, fire, hot, tide, undulating, boiling, agitation, waving).

Latin

aestus

heat, fire, hot, tide, undulating, boiling, agitation, waving

The physical world

Person/Thing

暑, 熱