This is a request to reopen the question, "Sounds which seem to express a particular quality whatever words they appear" I believe that it is a perfectly legitimate question and not a not real one, as simchona, MετάEd, Mr. Shiny and New 安宇, cornbread ninja and tchrist stated.
Indeed, if any, the question is an "expert" one, I would say.
In fact, the answer is (PHONESTHEME):
The term phonestheme (or phonaestheme in British English) was coined in 1930 by British linguist J. R. Firth (from the Greek φωνή phone, "sound", and αἴσθημα aisthema, "perception" from αίσθάνομαι aisthanomai, "I perceive") to label the systematic pairing of form and meaning in a language.
A phonestheme is different from a morpheme because it does not meet the normal criterion of compositionality.
So, I would like to post my own answer.