sit in on

show up visit

appear catch frequent haunt show

be a guest be at be present be there bob up check in clock in come to light drop in go to make an appearance make it make the scene pop up punch in punch the clock ring in time in turn up

hide

be absent be lazy disregard ignore neglect

advance assist help lead strengthen support

aid augment conduce fortify redound reinforce supplement tend uphold

add to be conducive be instrumental do one's bit finger in the pie get in the act have a hand in put in two cents

decrease hinder hurt stop

injure subtract weaken

counteract disapprove harm neglect oppose shun take take away withdraw withhold

consume devour divide engage feed ingest participate receive sample savor sip take

be a party to be in on be into enter into get in the act have a finger in sit in take part tune in

abstain collect gather give offer refuse reject shun starve

refrain

aid compete cooperate engage engage in perform play share

concur partake strive

associate with be a participant be a party to be into chip in come in enter into get in on get in on the act go into have a hand in have to do with join in latch on lend a hand sit in take an interest in tune in

block direct hinder impede obstruct prevent stop

observe watch