And as the encamisados came along they muttered to themselves in a low plaintive tone.
The instant she recognised him, with a prolonged plaintive cry drawn from the depths of her heart, she fell backwards fainting, and but for the barber being close by to catch her in his arms, she would have fallen completely to the ground.
…injuries done by tyrannical and wicked men in this world, I may tell you that some days ago passing through a wood, I heard cries and piteous complaints as of a person in pain and distress; I immediately hastened, impelled by my bounden duty, to the quarter whence the plaintive accents seemed to me to proceed, and I found tied to an oak this lad who now stands before you, which in my heart I rejoice at, for his testimony will not permit me to depart from the truth in any particular.
…see, as it were, here now displayed before us a vast lake of bubbling pitch with a host of snakes and serpents and lizards, and ferocious and terrible creatures of all sorts swimming about in it, while from the middle of the lake there comes a plaintive voice saying: ’Knight, whosoever thou art who beholdest this dread lake, if thou wouldst win the prize that lies hidden beneath these dusky waves, prove the valour of thy stout heart and cast thyself into the midst of its dark burning…
The unfortunate duenna hearing herself thus conjured, by her own fear guessed Don Quixote’s and in a low plaintive voice answered, "Senor Don Quixote—if so be you are indeed Don Quixote—I am no phantom or spectre or soul in purgatory, as you seem to think, but Dona Rodriguez, duenna of honour to my lady the duchess, and I come to you with one of those grievances your worship is wont to redress."
…also of the tales and episodes contained in it which are, in a measure, no less pleasing, ingenious, and truthful, than the history itself; which, resuming its thread, carded, spun, and wound, relates that just as the curate was going to offer consolation to Cardenio, he was interrupted by a voice that fell upon his ear saying in plaintive tones: "O God! is it possible I have found a place that may serve as a secret grave for the weary load of this body that I support so unwillingly?
"Why, there’s a ballad that says they put King Rodrigo alive into a tomb full of toads, and adders, and lizards, and that two days afterwards the king, in a plaintive, feeble voice, cried out from within the tomb— They gnaw me now, they gnaw me now, There where I most did sin.
…wolf’s savage howl, The horrid hissing of the scaly snake, The awesome cries of monsters yet unnamed, The crow’s ill-boding croak, the hollow moan Of wild winds wrestling with the restless sea, The wrathful bellow of the vanquished bull, The plaintive sobbing of the widowed dove, The envied owl’s sad note, the wail of woe That rises from the dreary choir of Hell, Commingled in one sound, confusing sense, Let all these come to aid my soul’s complaint, For pain like mine demands new…
There are no more uses of "plaintive" in the book.