1Certainly; without fail; necessarily — used to emphasize that something will or must happen, or that something must be done.
明日の会議には必ず出席してください。
Please be sure to attend tomorrow's meeting.
練習すれば、必ず上達する。
If you practice, you will definitely improve.
約束したことは必ず守るべきだ。
You should always keep the promises you make.
薬は食後に必ず飲んでください。
Please be sure to take the medicine after meals.