он поест

will eat, will have something to eat

p ɐ j e s t → поесть

по limited or one-time action + ест he/she/it future

verb · 3rd-person singular, future tense Rare #49,636

will eat, will have something to eat Perfective future form of «поесть».

RU: Он поест дома.

EN: He'll eat at home.

Conjugation of поесть

Indicative future

We’re not going until Mr. Frodo has eaten.

— Властелин колец: Возвращение короля (2003)

Tom said he would eat some fruit.

Tom will eat.

He’ll eat later.