to be afraid (of); to fear; to be frightened (of); to be scared (of); to worry (about)
犬を怖がる子が多い。
Many children are afraid of dogs.
妹は暗い場所をとても怖がっている。
My sister is very scared of dark places.
子供の頃は雷をひどく怖がった。
As a child, I was terribly afraid of thunder.