What is a common synonym for "serendipitous"?

The term "serendipitous" refers to events that occur by chance in a happy or beneficial way, often leading to unexpected discoveries or outcomes. Therefore, a common synonym for "serendipitous" is "unexpected." This captures the essence of something happening that you did not foresee, which aligns with the original meaning of the word.

In contrast, predetermined denotes something that is decided in advance, which does not fit with the idea of chance or fortuitous occurrences. Wondrous implies something that inspires wonder and admiration, but it does not necessarily convey the element of chance. Calculated refers to actions taken with careful planning and forethought, which again goes against the element of unexpectedness inherent in serendipity. Thus, the connection between "serendipitous" and "unexpected" highlights the element of surprise associated with fortunate events that occur without prior planning.