忠诚 loyal; faithful; staunch; fidelity; loyalty; truthful 忠诚可靠 both loyal and trustworthy; 以忠诚著称 have a name [be famed] for honesty; 忠诚党的教育事业。 be devoted to the party's educational task. 一旦他发了誓, 他的忠诚从不动摇。 once he took the vow his loyalty never wavered.; 忠诚血清 truth serum