Adverb
In an obligatory manner; by reason of obligation.
Source: Webster's dictionarythe ministry considers that contributions to such a fund should be met from voluntary donations rather than from rates compulsorily levied. Source: Internet
this rule applies obligatorily Source: Internet
Schwa syncope in consonants main In many Indo-Aryan languages, the schwa ('ə') implicit in each consonant of the script is "obligatorily deleted" at the end of words and in certain other contexts, citation unlike in Marathi or Sanskrit. Source: Internet
Obligatoriness of number marking In many languages, such as English, number is obligatorily expressed in every grammatical context. Source: Internet