1) Dangerous 2) Dangerously fast 3) Exclusively Saxon word 4) Exclusively Anglo word 5) Fastanddangerous 6) Moving at very high speed 7) Overfast 8) Recklessly fast 9) Too fast 10) Unsafe 11) Used of speed 12) Word of purely Anglo origin 13) Word with Anglo-Saxon origins Found on https://www.crosswordclues.com/clue/breakneck