संस्‍कृतशब्‍दकोशः

नैत्यक

नित्यानुष्ठेय, अनिवार्य, नित्य देय

to be performed regularly, obligatory, to be given daily

Monier–Williams

नैत्यक — {naityaka} mfn. to be always or regularly done (not occasionally##cf. {naimittika}), constantly repeated, invariable, obligatory &c##n. the food regularly offered to an idol