constantyoudaoicibaDictYouDict[constant 词源字典]
constant: see consist
[constant etymology, constant origin, 英语词源]
constant (adj.)youdaoicibaDictYouDict
late 14c., "steadfast, resolute," from Old French constant (14c.) or directly from Latin constantem (nominative constans) "standing firm, stable, steadfast, faithful," present participle of constare, from com- "together" (see com-) + stare "to stand," from PIE root *sta- "to stand" (see stet). Of actions and conditions from 1650s. Related: Constantly.
constant (n.)youdaoicibaDictYouDict
1832 in mathematics and physics, from constant (adj.).