English
immutably
From immutable + -ly.
A compound of immutable + -ly
Latin mūtō
Latin mūtābilis ‘mutable, changeable, inconstant’
Latin immūtābilis ‘unchangeable’
Middle English immutable ‘immutable, unchangeable’
English immutable
Today it means
adv In an immutable manner. In a way that cannot be varied, or changed.
Language periods are conventional ranges, not dates for this word.
Etymograph / immutably