WordNet sense 1 (be verified or confirmed; pass inspection):

check

WordNet sense 2 (trace):

run down

WordNet sense 3 (withdraw money by writing a check):

cheque

WordNet sense 4 (try to learn someone's opinions and intentions):

feel out, sound out

WordNet sense 5 (examine so as to determine accuracy, quality, or condition):

go over, check into, check over, check up on, suss out, look into