πικρία, -ας, ἡ
(πικρός), [in LXX chiefly for מַר and cognate forms ;]
bitterness;
__(a) of taste (Arist., Jer.15:17, al.);
__(b) metaphorically, of temper, character, etc.: Rom.3:14 (LXX), Eph.4:31; ῥίζα πικρίας, Heb.12:15; χολὴ π., a malignant disposition, Act.8:23.†
(AS)