A new word: obligate

obligate, verb, /ˈɑːbləˌgeɪt/

1 

to make someone have to do something, because it is the law, their duty, or the right thing to do SYN oblige. 

to make (a person or organization) do something because the law requires it or because it is the right thing to do.

be obligated to do something

Tenants are obligated to pay their rent on time.

The contract obligates the firm to complete the work in six weeks.

- usually used as (be) obligated

You are legally obligated to repay the loan. = You are obligated by law to repay the loan.

2

be/feel obligated to 

feel that you must do something because it is right or because someone has done something for you SYN  be/feel obliged.

be/feel obligated to do something

Ava felt obligated to help her mother, even if it meant leaving college.

be/feel obligated to somebody

Watson felt obligated to him for the loan.

I feel obligated to return his call.

obligation, noun, /ˌɑːblɪˈɡeɪʃn/

a moral or legal duty to do something.  something that you must do because of a law, rule, promise, etc. 

something that you must do because it is morally right.

obligation to

America’s obligation to its allies /ˈælaɪ/

Employers have an obligation to treat all employees equally.

Parents are under a legal obligation to educate their children.

You are under no obligation to buy any more books.

Greater resources are needed to meet these obligations.

the rights and obligations imposed on them by treaties.

The government must pay for health care for war veterans – it is an obligation we owe to them.

a moral obligation to help the poor.

He stayed with the team out of a sense of obligation.

The firm must fulfill its obligations under the contract. = The firm must fulfill its contractual obligations.

legal/financial/constitutional obligations

Both landlord and tenant should know their rights and obligations. [=responsibilities]

You can try the machine for free without obligation. [=without being required to buy it or to do anything else]

You are not under any obligation to stay. [=you are not required to stay]

You're under no (legal) obligation to return the money. [=there is no law that requires you to return the money; you do not have to return the money]

family/social obligations

She believes that all people have a moral obligation to defend human rights.

He argues that people in a community have certain obligations to each other.

She failed to fulfill her obligations as a parent.

We visited them out of a sense of obligation. [=a feeling that it was the right thing to do]