fortuitous
词形变化：
副词: fortuitously | 名词: fortuitousness |
同义词：
accidental | casual | adventitious | contingent | circumstantial | chance | unexpected | unplanned | incidental | causeless | uncaused |
反义词：
词义辨析：
同义参见:
accidental
adventitious
casual
circumstantial
contingent
反义:
a.偶然的; 意外的
intentional