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“fickleness” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

fickleness
inconstantia: varietas: infidelitas: levitas: mutabilitas mentis: mobilitas: infirmitas. [SYN. in INCONSTANCY.] (The words are found in this connection and order.) varietas atque infidelitas; levitas et infirmitas; inconstantia mutabilitasque mentis: mobilitas (PROP., mobility of anything round its centre, and thus tropically used by Cic., De Divin., 2, 6, 15, and Plin., 37, 1, 2, for “fickleness of fortune,” fortunae): instabilitas (e.g., mentis, Plin., 24, 17, 102).

Quick answer

What is the Latin word for fickleness?
The usual Latin words for “fickleness” are incōnstāns, varietās, īnfidēlitās; also levitās, mōbilitās, īnfirmitās. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.