invariable

/ɪnˈvɛriəbəl/
adjective
  1. Never changing; always the same.
    • The recipe calls for an invariable amount of salt, no matter the batch size.
    • Her invariable response to any compliment was a shy smile.
    • The sun rises at an invariable time each day in the tropics.
What does "invariable" mean? | whatsthatwordmean | whatsthatwordmean