trivialis

trĭvĭālis, e, adj. [trivium; prop. that is in or belongs to the cross-roads or public streets; hence, transf.], that may be found everywhere, common, commonplace, vulgar, ordinary, trivial (post-Aug.):

trivialis scientia,

Quint. 1, 4, 27: verba (opp. splendide atque adornate declamare), Suet. Rhet. 6:

ludii ex circo,

id. Aug. 74:

carmen,

Juv. 7, 55:

mos,

Calp. Ecl. 1, 28.