Letters that make unfirm
f, n, m, r, i, u are letters that make 'unfirm'
2 possible definitions for 'unfirm'
Under this definition, unfirm is an adjective and has the following properties:
unsteady has the same meaning as unfirm
unsteadiness, ricketiness are derivatives of 'unfirm'.
unfixed is similar to unfirm.
"climbing carefully up the unsteady ladder", "an unfirm stance"
Under this definition, unfirm is an adjective and has the following properties:
shifting has the same meaning as unfirm
loose is similar to unfirm.
"shifting sands", "unfirm earth"