obligatory

/əˈblɪɡət(ə)ɹi/

sifat adjective

Imposing obligation, legally, morally, or otherwise; binding; mandatory. an obligatory promise
Requiring a matter or obligation.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.