1. With bitterness, in a resentful manner
   "she complained bitterly" 
2. Indicating something hard to accept
   "he was bitterly disappointed" 
3. Extremely and sharply
   "it was bitterly cold"
   - piercingly, bitingly, bitter

See also: bitter

• obsolete
• obsoleteness
• obstacle
• obstacle course
• obstacle race
• obstetric
• obstetrical
• obstetrical delivery
• obstetrical toad
• obstetrician
• obstetrics
• obstinacy
• obstinance
• obstinate
• obstinately
• obstipate
• obstipation
• obstreperous
• obstreperously
• obstreperousness
• obstruct
• obstructed
• obstructer
• obstruction
• obstruction of justice