invariant
1. [ adjective ] (mathematics) unaffected by a designated operation or transformation
Related terms: mathematics invariable
2. [ adjective ] persistent in occurrence and unvarying in nature
Synonyms: constant steady unvarying changeless
Examples:

"maintained a constant temperature" "a constant beat" "principles of unvarying validity" "a steady breeze"

Related terms: invariable
Similar spelling:   inebriant
  invariance
  invariably
  invariable
  in_private
  infringe
  infuriate
  inebriety
  inebriate
  infuriated
  inebriated
  infuriation
  infuriating
  infringement
  inebriation
  inboard
  in_parallel