~がる (show signs of feeling)
grammar48 sentences
The suffix ~がる attached to emotion or sensation adjective stems (or some emotion nouns), forming a verb meaning 'show signs of feeling X / exhibit X / act as if X.' Used to describe a third party's state, since Japanese reserves bare adjectives like 寒い, 寂しい, 欲しい for first-person feelings. 怖がる ('be afraid'), 寂しがる ('appear lonely'), 寒がる ('act cold'), 欲しがる ('want [as observed]').