acontecimiento
/akonteθiˈmjento/ · B2 · noun · m
event
📰📅 acontecer (to happen) + -imiento (-ment) = a happening, an event
Acontecer means to happen, and it comes from Latin contingere, to touch or befall, the same root as English contingency. The ending -imiento turns a verb into a noun, like English -ment, so acontecimiento is the thing that happened.