IMITATIVE
copying or following a model or example
(of a word) reproducing a natural sound (e.g. fizz) or pronounced in a way that is thought to correspond to the appearance or character of the object or action described (e.g. blob).
(of a word) reproducing a natural sound (e.g. fizz) or pronounced in a way that is thought to correspond to the appearance or character of the object or action described (e.g. blob).