In notion of arbitrariness sassure says material sign as signifier .do explain. also tell about material manifestation.

the relationship between the two is arbitrary

the relationship between the two is arbitrary as we do not know why we call a chair by this sound c-h-a-i-r

for example for the sign chair we have the sound c-h-a-i-r which we are seeing now and it gives a mental picture of the concept of chair. remember it is not reffering to the real c...

SIGN has two parts - signifier and signified. signifier is the sound (either oral or written in symbols) and signified is the concept . as we can feel the signifier with out senses...