phrasal
1. : on the side of : with regard to or so far as concerns the one specified
the managers on the part of the House at the conference — U.S. Code
vigilance on our part — Thomas De Quincey
incentive for all-out effort on the part of every member — A.S.Igleheart
2. : as experienced, performed, or shown by
the thoughtfulness of this act on the part of these men — Metronome