[mass noun]the quality of being faithful and dependable 忠诚,忠实;可靠 ■the quality of being enduring and unchanging 坚定不移,不屈不挠;始终如一,恒久不变 the constancy of the tradition. 此传统的持久。
语源
late 15th cent.: from Latin constantia, from constant- 'standing firm' (see constant)