Completely surrounded or wrapped up in something; covered entirely.
From Old French 'envoleper,' possibly from 'en-' (in) plus 'volpe' (to wrap). It entered English in the 16th century and has maintained its meaning of surrounding or enclosing completely.
When fog 'envelops' a city, it's totally wrapped in mist—and this same word is used poetically to describe emotions, like when sorrow 'envelops' someone completely, showing how English loves to borrow from physical descriptions.
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