-ar /ə, ɑː $ ər, ɑːr/ BrE AmE suffix
[ Sense 1: Language: Latin ; Origin: -aris ]
[ Sense 2: Origin: -er ]
1 . [in adjectives] relating to something:
stellar (=relating to stars)
polar (=relating to the North or South Pole)
2 . [in nouns] someone who does something:
a liar (=someone who lies)