Biter-líce

According to the Old English Dictionary:

bitter-líce;

biter-líce

adv. BITTERLY; amare :-- He weóp biterlíce [Bos. bityrlíce] he wept bitterly, Mt. Jun. 26, 75. He ongan biterlíce [Smith, 600, 29, bitterlíce] wépan he began to weep bitterly, Bd. 4, 25; Whelc. 337, 43. biter-lice