Idiom Definition:
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"to be dead set"
to be absolutely determined about something
Synonyms:
adamant, bull-headed, dogged, firm, fixed, obdurate, opinion, opinionated, persevere, persevere, relentless, rigid, steadfast, tenacious, tough, unbending, unshakable, willful
This baby is
dead set against having his diaper changed. - - - - ->