This is the 123rd most frequent Armenian word.
ընդունել
To accept or to receive.
Here, "ընդունել" is used to mean "to accept." The context is receiving and agreeing to something offered, like an invitation.
Ես ընդունեցի հրավերը։
I accepted the invitation.
In this sentence, "ընդունել" means "to admit," describing the action of being accepted into an institution or group.
Կոլեջը որոշեց ինձ ընդունել։
The college decided to admit me.
Here, "ընդունել" is used in the sense of "to acknowledge," referring to admitting or accepting a fact or responsibility.