Morpheme
-(a)r [-ar, -r]
Type
suffix
Denotation
adjective suffix denoting “pertaining to, of the nature of”
Etymology
Latin -ārem, -āris, -ārium, -ārius, -āria
Evidence
calendar, calendric, collar, circular, columnar, linear, lunar, molecular, muscular, nebular, perpendicular, polar, rectangular
Homographs
ar-, -ar, -ar, -(e)r [-er, -r], -(o)r [-or, -r]