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participant noun

ADJ. full | active | unwilling, willing She was an unwilling participant in his downfall. | key, leading, main, major | course | conference, seminar

VERB + PARTICIPANT attract Protests on 12 April attracted 100,000 participants.

PARTICIPANT + VERB attend sth

PREP. ~ in an active participant in the discussion

participate verb

ADV. fully | actively

VERB + PARTICIPATE be able to, have the opportunity to | be allowed to, be encouraged to, be invited to Other countries were invited to participate in the project. | agree to | refuse to

PREP. in They will have the opportunity to participate actively in the decision-making process.