Enter a clue or pattern or both:
The Clue
Kirdzhali's river (4 letter answer)
The Answer
ARDA
Tags
Notes
The answer ARDA is so rare that it appears less than once every 2500 puzzles.
Related Clues
River in Bulgaria
Definition
ARDA as a noun:
1. (Advanced Research and Development Activity, ARDA) = an agency of the Intelligence Community that conducts advanced research and development related to information technology