Akademik

unassailably
adverb
in an unalterable and unchangeable manner
-

his views were unchangeably fixed

Syn: ↑unalterably, ↑unchangeably, ↑immutably
Derived from adjective: ↑immutable (for: ↑immutably), ↑unassailable, ↑unchangeable (for: ↑unchangeably), ↑unalterable (for: ↑unalterably)

Useful english dictionary. 2012.