Brain-busting
The crossword clue "Brain-busting" is answered by HARD, a 4-letter entry. Used 10 times across 8 distinct years; most recently in 2026; first recorded in 2000. It appears in 3 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
HARD
4 letters. See every clue for this answer on the HARD answer page.
Used 10 times across 8 distinct years; most recently in 2026; first recorded in 2000. It appears in 3 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for HARD
Every other clue in this collection answered by HARD, most used first.
- Difficult - used 129 times, most recently in 2026
- Challenging - used 32 times, most recently in 2026
- Tough - used 19 times, most recently in 2026
- Unyielding - used 14 times, most recently in 2015
- Arduous - used 10 times, most recently in 2026
- Knotty - used 10 times, most recently in 2025
- Like a rock - used 10 times, most recently in 2025
- Tough to crack - used 10 times, most recently in 2026
- No picnic - used 9 times, most recently in 2008
- High on the Mohs scale - used 8 times, most recently in 2017
- No walk in the park - used 8 times, most recently in 2026
- Obdurate - used 8 times, most recently in 2010
- Like some cider - used 7 times, most recently in 2026
- Nearly unsolvable - used 7 times, most recently in 2015
- Stony - used 7 times, most recently in 2015
- Granitelike - used 6 times, most recently in 2025
- Tough to solve - used 6 times, most recently in 2026
- Tricky - used 6 times, most recently in 2024
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Brain passage - ITER, used 46 times
- Brain section - LOBE, used 33 times
- Brain wave - IDEA, used 27 times
- Brain part - LOBE, used 22 times
- ___ mater (brain membrane) - DURA, used 21 times
- Brain flash - IDEA, used 16 times
Search the clue collection
Search by clue words or by answer, or type a pattern with the letters you have and a blank for each square you do not know. The characters _ ? . and - all work as blanks.