"I think "Chaotic" or the opposite of "Tranquil", because a trivial is the opposite of a trifling. (I might be wrong)"

- last person

they are incorrect the correct answer would be calm, peaceful, and relaxing

-N.Draconica

non-trivial

The word trivial means "useless". So a trivial set would be a useless set.

Trivial is an adjective.

Trivial functional dependencyA trivial functional dependency is a functional dependency of an attribute on a superset of itself. {Employee ID, Employee Address} → {Employee Address} is trivial, as is {Employee Address} → {Employee Address}.