lui partisse

left, would leave

→ partire
part to leave, to depart + iss imperfect subjunctive + e third-person singular imperfect subjunctive
verb · 3rd-person singular, imperfect tense Rare #43,796
left, would leave Imperfect subjunctive form of “partire”; often used after expressions of wanting or hoping.
IT: Speravo che partisse presto.
EN: I hoped he would leave soon.
Conjugation of partire
Subjunctive imperfect
SingularPlural
First partissi —
Second partissi —
Third partisse —

Non volevo che Tom partisse.

I didn't want Tom to leave.

Volevo che Tom partisse.

I wanted Tom to leave.

Non voleva che partisse.

He didn't want her to leave.

Era più sicuro nel caso lui ci fosse salito prima che lei partisse.

It was safer if he got in before she left.

— La fiamma del peccato (1944)