necessary (adjective) necessary: essential
Sinonime: ban,
bar, blackball, bust, cast out,
chase, deport,
discharge, dismiss, displace, dispossess, drum out, eject,
eliminate, evict,
exclude,
exile, expatriate, expulse,
fire, give the boot, give the hook, give walking papers, kick out,
oust,
proscribe, send packing, show the door,
suspend, throw out on ear, turn out
Antonime: admit,
allow,
permit,
take in,
welcome