Definition: force somebody to do something; "We compel all students to fill out this form"
Definition: commit in order to fulfill an obligation; "obligate money"
Definition: bind by an obligation; cause to be indebted; "He's held by a contract"; "I'll hold you by your promise"
Definition: To bind, compel, constrain, or oblige by a social, legal, or moral tie.
Definition: restricted to a particular condition of life; "an obligate anaerobe can survive only in the absence of oxygen"
Definition: Able to exist or survive only in a particular environment or by assuming a particular role.