Adverb
in an unalterable and unchangeable manner
Source: WordNetA true friend freely, advises justly, assists readily, adventures boldly, takes all patiently, defends courageously, and continues a friend unchangeably. William Penn
The glare of that much-mentioned brilliance, love, Broke out, to show Its bright incipience sailing above, Still promising to solve, and satisfy, And set unchangeably in order. So To pile them back, to cry, Was hard, without lamely admitting how It had not done so then, and could not now. Philip Larkin
his views were unchangeably fixed Source: Internet