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

See also: piercing

• umbrella fern
• umbrella magnolia
• umbrella pine
• umbrella plant
• umbrella sedge
• umbrella tent
• umbrella tree
• umbrella-shaped
• umbrellalike
• umbrellawort
• Umbria
• Umbrian
• Umbrina
• Umbrina roncador
• Umbundu
• umiak
• umlaut
• Umma
• Umma Tameer-e-Nau
• Ummah
• ump
• umpirage
• umpire
• umpteen
• umpteenth