verb-particle / intr ( idioms)
act up: behave badly
add up: make sense
bottom out: reach bottom
break out: escape
call by / in, round: visit shortly
catch on: understand
clock in: start
clock out: finish
come about: happen
come off: succeed
cut in: interrupt
die out: become extinct
dress up: put on best / fancy clothes
drop by / in: visit
ease off: work less hard
fall about: collapse with laughter
fall out: quarrel
fall through: be unsuccessful
get about / around: travel
get ahead: succeed
get on: have a good relationship
give in: surrender
go off: explode
go round: be enough
hold back: hesitate
keep on: continue
knock off: stop work
let on : reveal the secret