soothfast (adj.)youdaoicibaDictYouDict[soothfast 词源字典]
"truthful," Old English soðfæst "true, trustworthy, honest, just righteous;" see sooth (n.) + -fast. Related: Old English soðfæstnes "truthfulness, fairness, fidelity;" soðfæstlic "true, sincere;" soðfæstlice "truly, honestly."[soothfast etymology, soothfast origin, 英语词源]