Q / questus
noun

questus

gen. questūs · gender masculine · decl. 4th
a complaining; complaint; plaint
a complaining, complaint, plaint (class.).
In gen., Cic. Quint. 30, 94: caelum questibus implet, Verg. A. 9, 480: tantos…
In gen., Cic. Quint. 30, 94: caelum questibus implet, Verg. A. 9, 480: tantos illa suo rumpebat pectore questus, id. ib. 4, 553: tales effundit in aëra questus, Ov. M. 9, 370: edere questus, id. ib. 4, 587: in questus effundi, Tac. A. 1, 11: creber, id. ib. 3, 7: quaestu vano clamitare, Phaedr. 1, 9, 7.—
a complaint; accusation poetic
In partic., a complaint, accusation (poet.): questuque Jovem testatur acerbo, Val. Fl. 5, 624; 1, 113; Luc. 1, 247; 9, 880.—
the soft; plaintive note by extension
Transf., of the soft, plaintive note of the nightingale: maestis late loca questibus implet, Verg. G. 4, 515.