Added 9 October 2026 breakneck /ˈbɹeɪkˌnɛk/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about breakneck at Wordnik → Where our words come from → Moving at very high speed. a breakneck pace Origin From break + neck. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: dangerousunsaferapidhardcoreripsnortingsuddenspankinghellboundbreakbonedrasticwhite-knucklerapid-fire Back to today's word