give introduction

announce offer open propose recommend submit suggest

acquaint advance air broach familiarize harbinger herald moot originate precede preface usher ventilate

bring out bring up come out with do the honors fix up get things rolling get-together kick off knock down lead into lead off open up pave the way put forward set forth spring with start ball rolling

conceal deny dissuade hide refuse withhold

close close up end finish

erase extract subtract take away