The quality or state of being outdated, old-fashioned, or no longer current or useful.
From antiquated (adjective, past participle of antiquate) plus -ness (quality of). The layers of suffixes build from Latin antiquatus through English verb to adjective to abstract noun.
English lets us stack suffixes endlessly—from Latin root to -ed ending to -ness abstract noun. This particular word captures how we talk about TIME itself: what makes something feel 'aged' isn't years passing, but the feeling that it's been left behind.
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