Fortuitement. Cela est arrivé par hasard. Si, par hasard, vous veniez ŕ le rencontrer.
In an accidental manner; unexpectedly; by chance; unintentionally; casually; fortuitously; not deliberately.
Without advance planning; SYN. accidentally, circumstantially, unexpectedly.
In the haphazard course of events
ETYM French par by (Latin per) + chance. Related to Par, and Chance.
(Archaic) Through chance,; SYN. by chance.