Probably

наречие вероятно, наверное Например: it will probably rain — наверное, пойдёт дождь

Большой англо-русский словарь

Probably

1) вероятно 2) возможно 3) наверно

Англо-русский научно-технический словарь

Probably

adverb insofar as seems reasonably true, factual, or to be expected; without much doubt Example: is probably happy Example: it will probably rain

Merriam-Webster's Collegiate Dictionary