She gave him a disdainful look, as if he were beneath her notice.

彼女は彼に軽蔑的な視線を送った、まるで彼が彼女の注意に値しないかのように。

His tone was disdainful when he spoke about their efforts.

彼らの努力について話すとき、彼の口調は軽蔑的だった。