supererogatory
[adjective]
Synonyms: gratuitous, supererogant, supererogative, unasked, uncalled-for, wanton

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Contrasted words: essential, indispensible, vital, compulsory, obligatory, called-for, needful, required, requisite, sought, wanted
Related Words: nonessential, superfluous, supernumerary, unnecessary, unneeded

[TahlilGaran] English Synonym Dictionary ▲

su·per·e·rog·a·to·ry (spər-ĭ-rŏgə-tôrē, -tōrē) also su·per·e·rog·a·tive (-tĭv)
adj.
► Performed or observed beyond the required or expected degree.
► Superfluous; unnecessary: “It was supererogatory for her to gloat” (Mary McCarthy).

[TahlilGaran] American Dictionary ▲