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

See also: loose, unfixed

• Irving
• Irving Berlin
• Irving Howe
• Irving Langmuir
• Irvingia
• Irvingia gabonensis
• ISA
• Isaac
• Isaac Asimov
• Isaac Bashevis Singer
• Isaac Hull
• Isaac M. Singer
• Isaac Mayer Wise
• Isaac Merrit Singer
• Isaac Newton
• Isaac Stern
• Isaac Watts
• Isabella
• Isabella I
• Isabella Stewart Gardner
• Isabella the Catholic
• Isadora Duncan
• Isaiah
• Isak Dinesen
• Isamu Noguchi