(anatomy) a sphincter

restrict, limit

restriction, limitation

board of directors (group of people elected by stockholders)

a villain (bad person in a stage or screen play)

auditor (one who audits bookkeeping accounts)

active participation / being active / being energetic / being lively / being thriving / being successful / flourishing / making a big contribution / playing an active role / making a great achievement / contributing greatly / being productive

reservation, booking / appointment; an arrangement for a meeting / subscription

to jump, to leap

a jump, a leap