cobweb | WordDisk

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• a spider's web, especially when old and dusty.

• "the wooden carvings were almost obliterated by cobwebs"

Origin: Middle English coppeweb, copweb, from obsolete coppe ‘spider’ + web.

• banish a state of sluggishness; enliven or refresh oneself.
"a brisk walk along the towpath might blow away the cobwebs"