Maybe
来自Big Physics
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late Middle English: from the phrase it may be (that) .
wiktionary
From an ellipsis of it may be, equivalent to may + be. Compare mayhap.
etymonline
maybe (adv.)
"perhaps, possibly," early 15c., from (it) may be; see may (v.1) + be (v.). In early 19c. still sometimes written as two words. As a noun, "something that may be or happen," 1580s.
