adv. 25B6; adverb MAYBE, for all one knows, it could be, it may be, it's possible, possibly, conceivably; N. English happen; poetic/literary peradventure, perchance.
PERHAPS
Meaning of PERHAPS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012