godan verb (-ru), intransitive verb
appear uneasy; seem anxious; show signs of worry
Describes someone visibly showing anxiety or unease, often through behavior or expression. The subject is typically a third person; not used for one's own feelings.
彼は試験の結果を不安がっている。
He is anxious about the exam results.
子供が暗闇を不安がる
It's natural for children to be afraid of the dark.