(n.) A neglect or refusal to accept.

abjuration abjurement abnegation chucking chucking out contempt contradiction declension declination declinature declining denial deprivation despisal despising disagreement disallowance disapproval discard disclaimer disclamation discounting dismissal disobedience disownment disregard dissent exception exclusion holding back ignoring nay negation negative negative answer nix no nonapproval noncompliance nonconsent nonconsideration nonobservance passing by putting away putting out rebuff recantation refusal rejection renouncement repudiation repulse retention scouting spurning throwing out thumbs-down turndown turning out unwillingness withholding