Linguistics is the theoretical study of lingual (language is associated with the interpretation and understanding of signs) aspect of language
Like history, linguistics is also considered as a humanities because it deals with language, which is considered as a gateway to human mind.
During the Western colonization of the world, the chroniclers accounted for the languages of their colonized units. This provided information for the new study of language.
Andreas Jager (1660-1730) believed that the mother language of all languages in Europe and some parts of Asia originated from the Caucasus mountains
William Jones (1746-1832) discovered that there was a similarity between the languages of Asian and European languages.
In the late 19th and 20th centuries, the study of languages shifted from the study of language history to the structure of languages.
Ferdinand de Saussure (1857-1913), a Swiss linguist, is considered the pioneer of modern linguistics. He believed that language is a system of arbitrary signs.
Noam Chomsky (1928-present), an American linguist, believes that human speech constitutes the knowledge of the speaker of their grammar, as well as their biologically innate language faculty (the mind innately knows its language).
Physical aspects: phonetics or how humans measure and identify voices and sounds
Biological aspects: speech organs: brain, tongue, lips, etc.
Psychological aspects: processes, models of production of languages, memory, planning, comprehension
Social aspects: means of communication, the development, preservation, and modification of the languages
Diachronic linguistics: studies change and evolution of language
Synchronic linguistics: the study of language at a given time
Syntax: studies the principles of forming and understanding correct sentences
Morphology: studies the internal structure of words and how they are formed
Pragmatics: the study of the meaning of words in a larger context