心配 (shinpai) means "worry," "concern," or "anxiousness." You use it when you are thinking about potential problems, risks, or someone's well-being. It expresses a feeling of unease or fear about the future. For example, 「明日の天気が心配です。」 (I'm worried about tomorrow's weather.)

何か悪いことが起きるのではないかと、不安に思う気持ちです。人のことを思うときも使います。「明日の天気が心配です。」