必须

Your proposal will necessitate borrowing more money.

Theory must be integrated with practice.

For applicants, a high school diploma is a must.

requisite quality

must do as one was told

All expenditures must be entered (up) in the accounts.

You must come tomorrow.

Discipline is essential in an army.

Tenants are obliged to maintain the property in good condition.

Impartiality is essential to a judge.