he fell in with a bad crowd : GET INVOLVED WITH, take up with, join up with, go around with, string along with, make friends with; informal hang out/about with.
he won't fall in with their demands : COMPLY WITH, go along with, support, cooperate with, obey, yield to, submit to, bow to, defer to, adhere to, conform to; agree to, agree with, accept, concur with.
2192; headword