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The French word

occasionner

means
to cause, bring about
Examples:
La tempête n'a occasionné aucun dommage.
The storm didn't cause any damage.
La tempête occasionna beaucoup de dommage.
The storm caused a lot of damage.
L'orage a occasionné une coupure de courant.
The storm caused a power outage.
Examples sourced from tatoeba.org