staleness

nouns

unoriginality as a result of being dull and hackneyed

staleness, triteness

is derived from

having lost purity and freshness as a consequence of aging

staleness

is derived from

antonym

is a type of (narrower)

the opposite of youngness

is an attribute of

lacking freshness, palatability, or showing deterioration from age

"stale bread"; "the beer was stale"