bitterly

English

From Middle English bitterli, biterli, biterliche, from Old English biterlīċe, bitterlīċe (“bitterly”), equivalent to bitter +‎ -ly. Cognate with German Low German bitterlik (“bitterly”), German bitterlich (“bitterly”), Swedish bitterligen (“bitterly”).

bitterly (comparative more bitterly, superlative most bitterly)

In a bitter manner.
- 1897 December (indicated as 1898), Winston Churchill, chapter IV, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd., →OCLC:
  Judge Short had gone to town, and Farrar was off for a three days' cruise up the lake. I was bitterly regretting I had not gone with him when the distant notes of a coach horn reached my ear, and I descried a four-in-hand winding its way up the inn road from the direction of Mohair.
- 1956 [1880], Johanna Spyri, Heidi, translation of original by Eileen Hall, page 91:
  Heidi threw herself down beside Clara's chair and began to cry bitterly.
- 2011 October 1, Phil McNulty, “Everton 0-2 Liverpool”, in BBC Sport:
  Liverpool's £58m strikeforce of Andy Carroll and Luis Suarez scored the goals that settled the Merseyside derby at Goodison Park - but Everton were left complaining bitterly about Jack Rodwell's controversial early red card.
Extremely
- 2023 December 1, Emma Sanders, “England 3-2 Netherlands”, in BBC Sport‎:
  On a bitterly cold evening at Wembley, the Lionesses knew only victory would be enough to keep alive Team GB's hopes of competing in Paris.

Some adjectives commonly collocating with bitterly:

in a bitter manner