βάκτρῳ δ' ἐρείδου περιφερῆ στίβον χθονός → support with a staff your steps that waver on the ground
ex-ăcesco: ăcŭi, 3,I v. inch. n., to become sour (rare): ficus, Col. 12, 17, 1.
exăcēscō, cuī, ĕre, intr., devenir aigre, s’aigrir : Col. Rust. 12, 17.
