gratuitous

1 not costing or charging anything they will throw in a gratuitous box of chocolates when you spend $30 or more in their shop Synonyms complimentary, costless, gratis, freeRelated Words nominal; bestowed, donated, given; pro bono; discretionary, freewill, optional, voluntary; honorary, uncompensated, unpaidNear Antonyms paid; costly, dear, expensive, high

2 not needed by the circumstances or to accomplish an end that violent scene was completely gratuitous and didn't need to be in the movie at all Synonyms dispensable, unnecessary, inessential, needless, nonessential, uncalled-for, unessential, unwarrantedRelated Words discretionary, elective, optional; extra, extraneous, irrelative, irrelevant, redundant, superfluousNear Antonyms all-important, crucial, important, vital; imperative, pressing, urgentAntonyms essential, indispensable, necessary, needed, needful, required