resilience (n.)youdaoicibaDictYouDict
1620s, "act of rebounding," from Latin resiliens, present participle of resilire "to rebound, recoil," from re- "back" (see re-) + salire "to jump, leap" (see salient (adj.)). Compare result (v.). Meaning "elasticity" is from 1824.
resiliency (n.)youdaoicibaDictYouDict
1660s, "tendency to rebound;" see resilience + -cy. Meaning "power of recovery" is from 1857.
resilient (adj.)youdaoicibaDictYouDict
1640s, "springing back," from Latin resilientem "inclined to leap or spring back," present participle of resilire (see resilience). Figuratively, of persons, from 1830. Related: Resiliently.