n.
Function: noun suffix
Etymology: Middle English, from Anglo-French -ur, -our, -eour & Latin -or; Anglo-French -ur, -our, from Latin -or; Anglo-French -eour, from Latin -ator, from -a-, v. stem + -tor, agent suffix; akin to Greek -t ō r, agent suffix, Sanskrit -t ā
: one that does a (specified) thing <grant or >