SYN: Act, serve, perform.
ANT: Retire, witness.
=
KEY: Officious.
SYN: Meddling, interfering, pushing, forward, intrusive, intermeddling.
ANT: Backward, negligent, remiss, unofficious, retiring, modest, backward.
=
KEY: Often.
SYN: Frequently, repeatedly.
ANT: Infrequently, seldom.