ig ‧ no ‧ ble /ɪɡˈnəʊb ə l $ -ˈnoʊ-/ BrE AmE adjective formal
[ Date: 1400-1500 ; Language: Latin ; Origin: ignobilis , from in- 'not' + gnobilis , nobilis ( ⇨ ↑ noble 1 ) ]
ignoble thoughts, feelings, or actions are ones that you should feel ashamed or embarrassed about SYN base :
ignoble feelings of intense jealousy