unapt

adjective2

1. •
   Not apt, inappropriate, unsuited.

   • Some leap to the strains with unapt foot, and make a halting figure in the universal dance. — 1878
2. •
   (no longer used) Unaccustomed.

   • I am a Souldier, and vnapt to weepe, / Or to exclaime on Fortunes ficklenesse. — 1591