otiose

形容词 otiose:

1. serving no useful purpose; having no excuse for being
   同义词：pointless, superfluous, wasted
2. producing no result or effect
   同义词：futile, ineffectual, unavailing
3. disinclined to work or exertion
   同义词：faineant, indolent, lazy, slothful, work-shy

o.ti.ose

adj.（形容词）
Lazy; indolent.
懒惰的；怠倦的
Of no use.
没用的
Ineffective; futile.See Synonyms at vain
无益的；无效果的参见 vain

来源：
Latin ôtiôsus [idle]
拉丁语 ôtiôsus [闲散的]
from ôtium [leisure]
源自 ôtium [悠闲]

【引伸】
o.tiose.ly
adv.（副词）
o.tios.ity