The word 'virtue' entered English via Old French 'vertu', which descended from the Latin 'virtus', meaning 'manliness, excellence, worth'. This Latin term itself is derived from 'vir', meaning 'man'. The conceptual journey is one of semantic broadening and abstraction: from a quality specifically associated with an ideal Roman male (strength, valor, moral character) to a generalized concept of moral excellence and inherent goodness applicable to anyone or anything. This evolution reflects how a culture's core ideal of human excellence became the standard term for ethical goodness and positive attributes.

The word 'virtue' is a simplex loanword from Latin. It cannot be meaningfully segmented into smaller, independent morphemes using its modern English spelling without resorting to root variants (e.g., 'vir', which is not a direct substring of 'virtue').