This is the 5706th most frequent Russian word.
принимали
"Accepted" or "received" (past tense, plural).
Here, 'принимали' means 'entertained' or 'hosted', referring to receiving and attending to guests in a hospitable manner.
Мы принимали гостей весь вечер.
We entertained guests all evening.
In this usage, 'принимали' translates to 'participated', meaning to be an active part of an event or activity.
Они принимали участие в соревнованиях.
They participated in the competitions.
Here, 'принимал' is used to mean 'saw' or 'attended to', specifically referring to the professional consultation context by a doctor.