Expressing a complaint or grievance; grumbling: a querulous voice; querulous comments.
[Middle English querulose, litigious, quarrelsome, from Old French querelos, from Late Latin querulōsus, querulous, from Latin querulus, from querī, to complain; see kwes- in Indo-European roots.] quer'u·lous·ly adv., quer'u·lous·ness n.
c.1500, from O.Fr. querelos, from L.L. querulosus, from L. querulus "full of complaints, complaining," from queri "to complain." Retains the original vowel of quarrel (1).