breakneckKK [ˋbreˏknɛk] /ˈbɹeɪˌknɛk/形容詞1飛快的、極快的、疾速的多用於 speed、pace 前The car sped down the narrow road at breakneck speed.那輛車以飛快的速度衝下狹窄的道路。2險峻的、危險的They climbed the breakneck trail without any safety gear.他們沒有任何安全裝備就爬上那條險峻的山徑。