gratuitous

Adjective
  1. Without cause (synset 301374480)
    "a gratuitous insult"
    similar to: unmerited - not merited or deserved
  2. Costing nothing (synset 301714713)
    "complimentary tickets"; "free admission"
    similar to: unpaid - not paid
    same as: complimentary, costless, free, gratis
  3. Unnecessary and unwarranted (synset 301586457)
    "a strikers' tent camp...was burned with needless loss of life"
    similar to: unnecessary, unneeded - not necessary
    same as: needless, uncalled-for

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