Constraint (noun)

1. A restriction or limitation on something.
2. A factor or condition that limits or affects a particular activity or situation.
3. A principle, condition, or rule that must be satisfied or obeyed.

Origin:

Late 16th century: from french contrainte, from old french constreinte, from latin constrictio(n-), from constringere "to bind together", from con- "together" + stringere "to bind".

Examples:

1. The constraint on government spending has led to cuts in many areas.
2. Time constraints prevent us from doing everything we want to do.
3. The constraint of the treaty was the main reason for the country's decision.
4. The constraint of limited resources made it difficult to complete the project.
5. The constraint of the budget limited the scope of the renovations.