passkey

The word 'passkey' is a transparent compound formed within English from the native words 'pass' and 'key'. 'Pass', with its Latin-derived sense of moving through an opening or barrier, combines with 'key', an Old English word for a tool that unlocks. The compound literally means "a key for passing through," originally referring to a master key that could open multiple locks, such as those used by a hotel keeper or janitor. This concrete sense of a physical object that grants passage was logically extended in the digital age to denote a password or code that grants access to a restricted system, preserving the core concept of an instrument enabling authorized entry.

Structure: pass + key pass: From Middle English 'passen', from Old French 'passer', from Latin 'passus' (step, pace). Functional role: Verb root conveying the concept of moving through or gaining entry. key: From Middle English 'keye', from Old English 'cǣg'. Functional role: Noun root denoting an instrument that opens or secures.