indisposed

I'm afraid I'll be indisposed tomorrow, so I can't attend the meeting.

恐怕我明天身体不适，所以无法参加会议。

She felt indisposed after the long flight and went straight to bed.

长途飞行后她感觉身体不适，直接上床睡觉了。

The speaker was indisposed, so the event organizers had to find a replacement.

演讲者身体不适，所以活动组织者不得不另找替代人选。