almost certainly; as far as one knows or can tell.
“she would probably never see him again”
synonyms: in all likelihood, in all probability, as likely as not, (very/most) likely, ten to one, the chances are, doubtless, no doubt; archaiclike enough
“I knew I would probably never see her again”
I probably posted this wrong…but please know I did my very best!! I re-checked the posting-rules, (no photos, proper tags, correct title & category, etc) fingers-crossed I did it correctly as I’d hate to inconvenience anyone. Asking for forgiveness if I failed to do so properly!!