adjective Recklessly determined to do or achieve (something). .mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[with on ‘something’]
He was hell-bent on coming first, no matter what.
adverb In a recklessly determined manner; determinedly, wholeheartedly.