1. Exclamation of annoyance
   - blast, botheration, bummer, curses, dang [N. Amer], damn, damnation, dammit, damn it, darn, drat, hang

Encyclopedia: Durn

• understock
• understood
• understrength
• understructure
• understudy
• undersurface
• undertake
• undertaker
• undertaking
• underthings
• undertide
• undertone
• undertow
• undervaluation
• undervalue
• undervest
• underwater
• underwater archaeology
• underwater archeology
• underwater diver
• underway
• underwear
• underweight
• underwhelm
• underwing