From , from ōtium ("ease").

• (RP) IPA: /ˈəʊ.ʃi.əʊs/ or /ˈəʊ.ti.əʊs/
• (America) IPA: /ˈoʊ.ʃi.oʊs/ or /ˈoʊ.ti.oʊs/

otiose

1. Having no effect.
2. Done in a careless or perfunctory manner.
3. Reluctant to work or to exert oneself.
   • 1996, David Foster Wallace, Infinite Jest […], Boston, Mass., New York, N.Y.: Little, Brown and Company, →ISBN, page 216 ↗:

     Pemulis, w/ aid of 150mg. of time-release Tenuate Dospan, almost danced a little post-transaction jig on his way up the steps of the otiose Cambridge bus.

4. Of a person, possessing a bored indolence.
5. Having no reason for being (raison d’être); having no point, reason, or purpose.

• (resulting in no effect): futile, ineffective
• (reluctant to work): indolent, lazy, sluggish
• (having no reason or purpose): superfluous, irrelevant, pointless

• (resulting in no effect): productive, useful
• (reluctant to work): hardworking
• (having no reason or purpose): essential, necessary

• negotiate
• negotiation

• French: inutile
• German: fruchtlos, vergeblich, nichtig
• Italian: inutile, vano
• Russian: бесполе́зный
• Spanish: inútil

• French: oisif
• German: müßig
• Italian: ozioso
• Russian: лени́вый
• Spanish: ocioso, desocupado

• German: zwecklos
• Russian: бесце́льный