G4090
πικρῶς
bitterly
πικρῶς adv. (πικρός), [in LXX for מַר, מָרַר pi. ;] bitterly: metaphorically, (cf. πικρὸν δάκρυον, Hom.), ἔκλαυσε π., Mat.26:75, Luk.22:62 (see MM, xviii, see word παρακολουθέω).† (AS)
The KJV translates G4090 in the following manner:
bitterly (4x)
Full Thayer's lexicon entry
πικρῶς — pikrōs
πικρῶς, adverb (from Aeschylus down), bitterly: metaphorically, ἔκλαυσε, i. e. with poignant grief, Mat 26:75; Luk 22:62 (here WH brackets the clause); cf. πικρόν δάκρυον, Homer, Odyssey 4, 153.
2 occurrences
Matthew (1), Luke (1)