A person who helps or assists another person in a task or responsibility, often in an official capacity.
From Latin co- + adjutator (helper), from adjutare (to help). This term became standardized in ecclesiastical and governmental hierarchies during the Medieval period to describe assistant positions.
The Vatican still uses 'coadjutor bishop' as an official title for a bishop who assists the main bishop—this medieval word is alive and well in modern church structure!
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