loro combinano

are up to, are getting up to, combine

→ combinare
combin combine; put together + ano 3rd-person plural present
verb · 3rd-person plural, present tense Rare #37,953
are up to, are getting up to Often used colloquially in questions about what someone is doing, sometimes with the implication that they may be causing trouble.
IT: I ragazzi combinano sempre qualcosa.
EN: The kids are always up to something.
combine Used with si to mean that things combine with each other.
IT: Queste sostanze si combinano facilmente.
EN: These substances combine easily.
Conjugation of combinare
Indicative present
SingularPlural
Second combini —
Third combina combinano

Ma cosa combinano?!

What on earth are they up to?!

— Kiki - Consegne a domicilio (1989)

Cosa combinano?

What are they up to?

— I diabolici (1955)

Se non ci siamo anche noi, quelli ti combinano la repubblica.

If we're not there too, they'll ruin your republic.

— Il gattopardo (1963)

Che combinano?

What are they up to?

— I visitatori (1993)

L'idrogeno e l'ossigeno si combinano per formare l'acqua.

Hydrogen and oxygen combine to form water.

Sai, ai nostri tempi non è come adesso che"se ne combinano di tutti i colori".

You know, back in our day it wasn’t like it is now, when people “get up to all sorts of things.”

— Amarcord (1973)