[an-uh p-tot-ik]
adjective Archaic.
  1. (of languages) tending to become uninflected, in accordance with a theory that languages evolve from uninflected to inflected and back.

Origin of anaptotic

1840–50; an-3 + aptote (< Greek áptōton, noun use of neuter of áptōtos uninflected, not falling, equivalent to a- a-6 + ptōtós falling, verbid of píptein to fall) + -ic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018