unnecessary adj.
VERBS appear, be, prove, seem | become | make sth, render sth | consider sth, deem sth, regard sth as
ADV. completely, entirely, quite, totally, wholly No, no, that's quite unnecessary. | largely | a little, rather, somewhat | strictly
PREP. to the possession of items strictly unnecessary to survival
You can also check other dicts: unnecessary (English, 中文解释 ), wordnet sense, Collins Definition