Enter a clue or pattern or both:
The Clue
In a fixed manner (11 letter answer)
The Answer
UNALTERABLY
Tags
Notes
The answer UNALTERABLY is so rare that it appears less than once every 2500 puzzles.
Definition
UNALTERABLY as an adverb:
1. (unalterably, unchangeably, unassailably, immutably) = in an unalterable and unchangeable manner; "his views were unchangeably fixed"