"to hide, conceal," early 14c., a Northern English and Northern Midlands word, from Old Norse fela "to hide," from Proto-Germanic *felhan (Cognates: Gothic filhan "to hide, bury," Old English feolan "enter, penetrate, pass into").
"faithful," 1560s, not found in Middle English but apparently from Old French feal "faithful, loyal, true, sincere," collateral form of feeil, from Latin fidelis "loyal" (see fidelity).
双语例句
1. The surface of the steel matrix composites reinforced by Al - C - Ti system has more FeAl phase.
