inane
adjectiveLacking sense or substance.
Empty; void; especially, void of sense or intelligence; senseless; silly.
Synonyms Frivolous, puerile, trifling.
nounThat which is void or empty; void space; emptiness; vacuity.
adjectiveWithout contents; empty; void of sense or intelligence; purposeless; pointless; characterless; useless.
nounThat which is void or empty.
adjectiveThat which is
devoid of intelligence