O / ŏpĕrūla
noun

ŏpĕrūla

gen. ŏpĕrūlae · gender feminine · decl. 1st
a little trouble; slight service
a little trouble, slight service (post-class.), Dig. 50, 14, 3.—
earnings; gain by extension
Transf., earnings, gain (postclass.): operulas merere, App. M. 1, p. 105, 31.