Otiose is a colorful, although somewhat old-fashioned, word for "lazy." It also means serving no useful purpose: that steak knife next to your plate is otiose if you're having oatmeal for dinner.

Otiose, which can be pronounced either with a t sound (OH-tee-ohs) or a sh sound (OH-she-ohs), comes from the Latin word otium "leisure," but its modern meaning is closer to "leisure suit," that is, useless and not very handsome. If you're already wearing suspenders, then a belt is otiose.

Definitions of otiose
  1. adjective
    serving no useful purpose; having no excuse for being
    otiose lines in a play”
    synonyms: pointless, purposeless, senseless, superfluous, wasted
    lacking in usefulness or value
  2. adjective
    producing no result or effect
    “an otiose undertaking”
    synonyms: futile, ineffectual, unavailing
    having no beneficial use or incapable of functioning usefully
  3. adjective
    disinclined to work or exertion
    synonyms: faineant, indolent, lazy, slothful, work-shy
    not in action or at work
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