Obligate (verb)

1. To bind or constrain legally or morally.
2. To make something necessary or required.
3. To bind or constrain by a pledge or promise.

Origin:

From latin obligatus, past participle of obligare, meaning "to bind, to oblige".

Examples:

1. The contract obligates the contractor to complete the project within the specified time frame.
2. The company is obligated to provide its employees with a safe working environment.
3. I obligate myself to return the borrowed money by the end of the month.
4. The treaty obligates the signatories to reduce their greenhouse gas emissions.
5. The government is obligated to protect the rights of its citizens.