Covered with cobwebs; dusty or neglected, often used to describe something forgotten or unused.
From Middle English 'cop' (spider) + 'web,' with 'cob' being a dialectal form. 'Cobwebbed' as an adjective describing something covered in webs emerged in the 17th century and later became metaphorically used for neglected things.
The word 'cobwebbed' perfectly captures why old attics feel eerie—actual cobwebs are made of abandoned egg sacs and dust, so seeing them really does indicate genuine neglect and the passage of time.
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