ab ‧ ne ‧ ga ‧ tion /ˌæbnəˈɡeɪʃ ə n, ˌæbnɪˈɡeɪʃ ə n/ BrE AmE noun [uncountable] formal
[ Date: 1500-1600 ; Language: Late Latin ; Origin: abnegatio , from Latin abnegare 'to refuse' , from ab- 'away' + negare 'to deny' ]
when you do not allow yourself to have or do something that you want ⇨ self-denial