Child; Latin puerilis ("child, adolescent"); a fact that has little relevance. This last might be of paucus ("little, little") and that both have a common etimo.
It means that it has no value or interest. Little valuable. Trivial, insignificant, bland, childish, trivial, futile, frivolous. It can also mean known, trite, ordinary, regular, vulgar.
Behavior of little basis or justification value with reference to the age that has the agent.