"obligate" in the verb sense
1. compel, oblige, obligate
force somebody to do something
"We compel all students to fill out this form"
2. obligate
commit in order to fulfill an obligation
"obligate money"
3. oblige, bind, hold, obligate
bind by an obligation cause to be indebted
"He's held by a contract"
"I'll hold you by your promise"
"obligate" in the adjective sense
1. obligate
restricted to a particular condition of life
"an obligate anaerobe can survive only in the absence of oxygen"
Source: WordNet® (An amazing lexical database of English)
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