Englishparticipate
verb
400,000 people participated in the peaceful demonstration:
take part, engage, join, get involved, share, play a part, play a role, be a participant, partake;
cooperate, help, assist, lend a hand;
go in for, contribute to, be associated with, associate oneself with, have a hand in, have something to do with, be (a) party to;
informal get in on the act, pitch in.
participate Oxford Dictionary of English