obligatorily

Adverbial obligatorily has 2 senses

• obligatorily(r = adv.all) - in an obligatory manner; "this rule applies obligatorily"
Antonym: optionally

• obligatorily(r = adv.all) compulsorily, mandatorily - in a manner that cannot be evaded; "the ministry considers that contributions to such a fund should be met from voluntary donations rather than from rates compulsorily levied."