Enter a clue or pattern or both:
The Clue
Harmful (11 letter answer)
The Answer
DELETERIOUS
Tags
Notes
The answer DELETERIOUS is so rare that it appears less than once every 2500 puzzles.
Definition
DELETERIOUS as an adjective:
1. (deleterious, hurtful, injurious) = harmful to living things; "deleterious chemical additives"