Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
mayhap is an adverb meaning "by chance". It carries one recorded sense.
by chance
“perhaps she will call tomorrow”
“we may possibly run into them at the concert”
“it may peradventure be thought that there never was such a time”
Definitions, synonyms and semantic relations for mayhap come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.