have a firm understanding or knowledge of; be on top of | reach, make, or come to a decision about something |
be careful or certain to do something; make certain of something | fix conclusively or authoritatively |
verify by using a duplicate register for comparison | shape or influence; give direction to |
handle and cause to function | fix in scope; fix the boundaries of |
maintain influence over (others or oneself) skillfully, usually to one's advantage | establish after a calculation, investigation, experiment, survey, or study |
exercise authoritative control or power over | find out, learn, or determine with certainty, usually by making an inquiry or other effort |
lessen the intensity of; temper; hold in restraint; hold or keep within limits | decide upon or fix definitely |
check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard | settle conclusively; come to terms |
place under restrictions; limit access to by law | |