The adverb has 4 meanings:
Meaning #1:
by chance
Synonyms: perchance, perhaps, maybe, peradventure
Meaning #2:
with a possibility of becoming actual
Synonym: potentially
Derived from adjective: possible (meaning #2)
Meaning #3:
in a manner or to a degree possible of conceiving
Antonym: impossibly (meaning #1)
Derived from adjective: possible (meaning #3)
Meaning #4:
to a degree possible of achievement or by possible means
Antonym: impossibly (meaning #2)
Derived from adjective: possible (meaning #1)



