phonaesthetic

adjective3

1. •
   Exhibiting phonaesthesia (correspondence between sound and meaning of a word).

   • Phonaesthetic motivation, as we said, arises either from crude imitation or from sound association, which can be regarded respectively as (1) onomatopoeic; and (2) symbolic. — 2000
2. •
   Of or relating to phonaesthetics (aesthetics of phonology).
3. •
   Euphonious.