-ar

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ar1

▶suffix

• 1 (forming adjectives) of the kind specified: molecular.

• 2 forming nouns such as scholar. Compare with -er5.

– origin from OFr. -aire, -ier, or from L. -aris.

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ar2

▶suffix forming nouns such as pillar.

– origin via OFr. from L. -are (neut. of -aris).

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ar3

▶suffix forming nouns such as bursar.

– origin from OFr. -aire, -ier, or from L. -arius, -arium.

Concise Oxford English Dictionary © 2008 Oxford University Press:
-ar4

▶suffix alteration of -er1, -or1 (as in liar).