hit it off	to get on well with sb
hit upon	to discover ex. an idea by chance
hold out	to hope for, to have hope
hold up	to delay/ to use as an example
hold with	to agree with
keep up	to continue
lay down	to state a rule
let sb down	to disappoint sb
let sb in on sth	to allow to be part of a secret
let sb off	to excuse from punishment
let on	to reveal a secret
live it down	to suffer a loss of reputation
live up to	to reach an expected standard
look into	to investigate
look on sth	to consider
look sb up	to visit when in the area
make for	to result in
make off with sth	to run away with sth
make out	to pretend/ to manage to understand
make sb out	to understand sb's behaviour
make sth up	to invent
make up for sth	to compensate for sth