This is the 4996th most frequent French word.
survenir
To occur or happen unexpectedly.
Here, 'survenir' is used to indicate the sudden occurrence of something, often unexpected.
Un problème peut survenir à tout moment.
A problem can arise at any moment.
In this case, 'survenir' refers to the emergence of an urgent or critical situation.
Il est important de réagir rapidement si une urgence survient.
It is important to react quickly if an emergency arises.
Here, 'survenir' conveys the idea of something positive or advantageous coming up unexpectedly.