Sleeveless garments worn over shirts or as undergarments, or legal rights that cannot be taken away.
From Old French 'vestir' meaning 'to clothe', derived from Latin 'vestis' meaning 'garment'. The financial meaning of 'vesting' developed in the 20th century from the idea of being 'clothed' with rights.
The word 'vest' creates a beautiful linguistic bridge between fashion and finance - when your stock options 'vest', you're essentially being 'clothed' with ownership rights, maintaining the ancient metaphor of garments as symbols of status and belonging.
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