overbitterly

• a word derived from bitter.
  bitter

  adjective

  having a harsh, disagreeably acrid taste, like that of aspirin, quinine, wormwood, or aloes.

Related Words

• acrimonious
• biting
• caustic
• fierce
• hateful
• intense
• rancorous
• resentful
• severe
• sour
• stinging
• vitriolic