obligate

/ˈɑbləˌɡeɪt/
adjective
  1. Required to do something because of a rule, law, or promise.
    • He felt obligated to attend the family reunion even though he was tired.
    • The landlord is obligated to fix the heating before winter.
    • Employees are obligated to follow the safety guidelines.
  2. (biology) Able to live or survive only in a particular environment or under specific conditions.
    • These bacteria are obligate anaerobes and die in the presence of oxygen.
    • An obligate parasite cannot survive without its host.
    • Oblate birds must migrate to find food during the winter.
Antonyms
verb
  1. To require or force someone to do something, usually because of a law, rule, or moral duty.
    • The contract obligates the company to deliver the goods by Friday.
    • The teacher's role obligates her to treat all students fairly.
    • As a citizen, you are obligated to pay taxes.
Antonyms