Meaning of “combine” - Learner’s Dictionary

combine

verb uk us /kəmˈbaɪn/
JOIN TOGETHER [ I, T ]

B2 to become mixed or joined, or to mix or join things together:

My wages combined with your savings should just pay for it.
The band combines jazz rhythms and romantic lyrics.
DO BOTH [ T ]

to do two or more activities at the same time:

I don't know how she combines working with studying.

(Definition of “combine” from the Cambridge Learner’s Dictionary © Cambridge University Press)