1. Extremely and sharply
   - bitterly, bitingly, bitter 
2. In a shrill voice
   - shrilly

See also: piercing

• Arabian Desert
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• Arabian Nights' Entertainment
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• Arabic
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• Arabidopsis
• Arabidopsis lyrata
• Arabidopsis thaliana
• arability
• arabinose
• Arabis
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• Arabis glabra
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• Arabist
• arable
• Araceae