1. Not firmly or solidly positioned
   "an unfirm stance"
   - unsteady 
2. (of soil) unstable
   "unfirm earth"
   - shifting

See also: loose, unfixed

• dented
• dentelle
• denticle
• denticulate
• denticulate leaf
• dentifrice
• dentil
• dentin
• dentine
• dentist
• dentist's drill
• dentistry
• dentition
• denture
• denturist
• denuclearise
• denuclearize
• denudate
• denudation
• denude
• denuded
• denumerable
• denunciation
• denunciative
• denunciatory