exacerbesco
Could not find exacerbescat in Logeion dictionaries.
exacerbescat Verb: present active subjunctive 3rd singular of exacerbesco
ex-ăcerbesco, ĕre,
- v. inch. n., to become exasperated, irritated, angry: quis est tam mitis quin exacerbescat, Ap. Apol. p. 327, 28.
exăcerbēscō, ĕre, intr., sʼaigrir ; sʼirriter : Apul. Apol. 85.
Inacerbirsi, valde acerbus fio.
Apul. Apolog. Quis est tam mitis, quin
Exacerbescat?