INANE
asinine, fatuous, inane
(adjective) extremely silly or stupid
Source: WordNet® 3.1
Etymology
Adjective
inane (comparative more inane, superlative most inane)
Lacking sense or meaning (often to the point of boredom or annoyance)
(lacking sense): Synonyms: silly, fatuous, vapid
Purposeless; pointless
Noun
inane (plural inanes)
That which is void or empty.
Anagrams
• -anine, Annie, nenia
Source: Wiktionary
In*ane", a. Etym: [L. inanis.]
Definition: Without contents; empty; void of sense or intelligence;
purposeless; pointless; characterless; useless. "Vague and inane
instincts." I. Taylor.
– In*ane"ly, adv.
In*ane", n.
Definition: That which is void or empty. [R.]
The undistinguishable inane of infinite space. Locke.
Source: Webster’s Unabridged Dictionary 1913 Edition