Unfaithfulness by virtue of being unreliable or treacherous

Usage examples of fickleness.

In private Hart had little good to say about the way Sally vilified Sam for his alleged fickleness, but in public she refrained from speaking against Tsung herself.

But I had another still more important motive for sorrow in the fickleness of fortune which had completely turned against me.

There are, furthermore, the accompanying symptoms of a coated tongue, bitter taste in the mouth, unpleasant eructations, scalding of the throat from regurgitation, offensive breath, sick headache, giddiness, disturbed sleep, sallow countenance, heart-burn, morbid craving after food, constant anxiety and apprehension, fancied impotency, and fickleness.

Thence, I suppose, my natural disposition to make fresh acquaintances, and to break with them so readily, although always for a good reason, and never through mere fickleness.

Whether from fickleness or from jealousy, he abandoned the Fragoletta, and joined in Venice a troop of comedians then giving performances at the Saint-Samuel Theatre.

The fickleness of men in costume in a manner burlesques their shifty and uncertain taste in literature.

Several men commiserated over the fickleness of women-at least they did when they there were no women around-and some of the unmarried women, contortionists and acrobats and seamstresses, began eyeing him much too warmly.