Meaning of -AR in English

-AR

-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)

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.