Enter a clue or pattern or both:
The Clue
Difficult to change or break (8 letter answer)
The Answer
IRONCLAD
Tags
Notes
The answer IRONCLAD is so rare that it appears less than once every 2500 puzzles.
Definition
IRONCLAD as a noun:
1. a wooden warship of the 19th century that is plated with iron or steel armor
IRONCLAD as an adjective:
1. sheathed in iron plates for protection
2. (ironclad, brassbound) = inflexibly entrenched and unchangeable; "brassbound traditions"; "brassbound party loyalists"; "an ironclad rule"