Are Languages Really Arbitrary?

 Are languages arbitrary? If you are a student of languages and linguistics, you might have been told that the answer to this is an absolute yes.Of course, language is a man-created subject, and as humans have complex, unpredictable thoughts and emotions, it is logical that languages are subject to arbitrariness in its most original creation. However, though I do agree to this to a certain extent, as a polyglot I claim that this isn't true for all aspects of the human language. Here I provide three examples to support my view.
  One evident example is the Korean language. According to Koreans, the Korean letters were invented according to the placing of the tongue when different sounds are produced. In this sense, even though the creation of the Korean lexicon may seem arbitrary, the Korean alphabet isn't.
  The second evident example that I have is Chinese. As most readers of this blog would know, the Chinese characters usually follow the form of the object that it represents. For example, water is written as "水", and wood is written as "木". All of this has to do with the natural form and shape that these words represent in life.
  Last but not least, we must not ignore the fact that not all words in occidental languages are arbitrary. In some English words, for example, the pronunciation or the feeling that comes with the word has to do with its meaning. For instance "squeeze" has a pronunciation that gets you thinking of the action of getting toothpaste out from a tube, and the word " splash" does leave the sound of water jumping in your mind. These are some of the numerous non-arbitrary lexicon in English, and surely there are a million other examples in the 6900 tongues that the world has!