θυμοῦσθαι

From LSJ

βάκτρῳ δ' ἐρείδου περιφερῆ στίβον χθονός → support with a staff your steps that waver on the ground

Source

Greek > English (Woodhouse Verbs Reversed)

(see also θυμόω): rage, be angry at, be angry with, be angry

Lexicon Thucydideum

irasci, to become angry, τὸ θυμούμενον, ira, anger, 7.68.1.