invariable

Từ điển Oxford Advanced Learner 8th

in·vari·able AW BrE [ɪnˈveəriəbl] NAmE [ɪnˈverəriəbl] adjective
always the same; never changing
Syn: ↑unchanging
•Her routine was invariable.
•his invariable courtesy and charm
•an invariable principle
compare ↑variable

Word Origin:
[invariable] late Middle English: from French, or from late Latin invariabilis, from in- ‘not’ + variabilis (from variare, from varius ‘diverse’).

Example Bank:
•This is an invariable law: true at all times and places.

• Từ đồng nghĩa / Synonyms:
  constant, constant quantity