declaring illegal (verb) ban: officially forbid
Sinonime: absolutely,
actually, almost certainly, assuredly, beyond question, by far,
certainly, clearly, decidedly,
definitely, doubtless, doubtlessly, far and away,
indeed, indisputably, indubitably, no doubt, plainly, positively,
probably,
really, surely,
truly, undeniably,
undoubtedly, unequivocally, unquestionably
Antonime: doubtedly, dubitably, questionably