Obligatory

1.

(បច្ចេកទេស) ដែលចាំបាច់, ដែល​ខានមិនបាន, ដែលជាកាតព្វកិច្ច

1.

(imperative, compulsory, mandatory, requisite, binding, enforced, essential) ដែលជាកតព្វកិច្ច, ដែលខានមិនបាន

1.

Binding in law or conscience; imposing duty or obligation; requiring performance or forbearance of some act; -- often followed by on or upon; as, obedience is obligatory on a soldier.