The nature of language means that a word represents what it is referring to either by association, resemblance, or convention.

The symbolic nature of language means that a word represents what it is referring to either by association, resemblance, or convention

Only less 10% of our day to day communication being done through verbal language, while the rest being conducted through non-verbal/symbolic language.
For example, we could communicate that we're currently sad without saying anything simply by crying in front of a person. because The act of crying is associated with the feeling of sadness.