Morpheme
-t(o)r [-tor, -tr]
Type
suffix
Denotation
agent suffix
Etymology
Latin -tor
Evidence
ancestor, ancestral, ancestress, ancestry, janitor, janitorial, janitoriat, janitoring, janitors, janitorship, janitress, nonobstetric, obstetric, obstetrically, obstetricate, obstetricated, obstetricates, obstetricating, obstetrication, obstetrication, obstetrician, obstetricians, obstetrics, teleobstetrics, underjanitor
See Also
-(o)r [-or, -r], -(e)r [-er, -r]