出典:Wiktionary
15th century, from Middle English [Term?], from Middle French fidélité, from Latin fidēlitās, from fidēlis (“faithful”), from fidēs (“faith, loyalty”) (English faith), from Proto-Indo-European *bʰidʰ-, zero-grade of *bʰeydʰ- (“to command, to persuade, to trust”) (English bide). Doublet of fealty.
fidelity (countable かつ uncountable, 複数形 fidelities)
気安いこと
親切 → unkindness 不親切.
the caritas