for·tu·i·tous
adjective/fɔːˈtjuːɪtəs/
/fɔːrˈtuːɪtəs/
(formal)- happening by chance, especially a lucky chance that brings a good result
偶然发生的；（尤指）巧合的 - a fortuitous meeting
偶然相遇。 - His success depended on a fortuitous combination of circumstances.
他的成功取决于环境的偶然组合。
Oxford Collocations DictionaryFortuitous is used with these nouns:- discovery
- timing
Word Originmid 17th cent.: from Latin fortuitus, from forte ‘by chance’, from fors ‘chance, luck’. - a fortuitous meeting