vicar

The source is Latin vicarius, meaning "substitute" or "deputy." Roman administration used it for a person acting in another's place. The idea was practical and legal before it was ecclesiastical. A vicar was someone who stood in for a higher authority.

As the Christian church organized its offices in late antiquity, the same Latin word moved naturally into clerical use. Bishops, abbots, and patrons needed deputies, and vicarius fit that function exactly. By the early medieval period the title could refer to a priest acting on behalf of a bishop or holder of church revenues. The office kept the Roman idea of delegated authority.

Anglo-French and Old French passed forms of the word into English after the Norman period. English records from the 14th century show vicar as an established church title. In England it became closely tied to the parish priest who received a stipend or lesser share where revenues belonged elsewhere. The social role grew distinctly English even while the word stayed Latin at heart.

Modern English still uses vicar chiefly in Anglican and related church contexts. The historical sense of "substitute" is still present, though now heard through office and custom rather than direct translation. The word names a priest, but it also preserves an old administrative logic. Authority is present, yet borrowed.