This thesis discusses about The concept of waliy in the Qur'ān (semantic of Toshihiko Izutsu approach). Its study was motivated by the word waliy which could not be verified both empirically and rationally so that the status of waliy is very prone to being misused by some people (individual or group). This study is intended to answer the question: (1) How the meaning of the word of waliy in the Qur'an by using semantic Toshihiko isutzu? (2) How the view of the Qur'an or weltanchauung in the concept of waliy The problems addressed through library research. In this case, researcher used the Holy Qur'ā n, classicand modern books of tafsir, for example tafsīr Ibn 'Abbās, tafsīr Qurtubī and tafsīr al-Miṣbāh, dictionary Lisān al-'Arāb, Al-Mu'jam Al-Mufahras lī al-fazil Qur'ān al-'Aziż and other sources that are still relevant to the research study , All data were analyzed by semantic of Toshihiko Izutsu approach. Meanwhile the descriptive analysis used deductive and inductive reasoning.
This study shows that the word of waliy in the Qur'an by using semantic Toshihiko isutzu, the basic meaning of the word waliy is closeness and its relational meaning is protector, helper, loyal friend, and leader. While the meaning of waliy from pre-Qur'anic period, Qur'anic period and post- Qur'anic are extremely diverse. This made religious issue comes to the surface. Comprehensively, the development of waliy’s meaning from pre Islam to the emergence of Islam was conceptualized as a protector even though both had a different culture especially in religion. And this becomes the characteristic and uniqueness al-Qur'ān, as when al-Qur'ān adopted some words of pre Islamic does not mean it changed the meaning contained in it. Al-Qur'ān only classified and specified that the waliy word indicates the nature of Allah as the Protector and Supreme Helper; and the waliy word related as well to human behavior as a loyal friend and a leader. And the weltanchauung or world of view the word of waliy, when introduced into the conceptual system of Islam and related to important words of the Qur’an, the word waliy can classified into the main group. (1) the words that represent concepts that relate to acts of God such as nasīr, syafi ', wāq, yuḥyī, and ḥamīd. (2) concepts that related to the closeness of man to his God as imān, mu’min ,muttaqīn, and ḥamīm. (3) the concepts of right road deviation such as syirk, żalal and żūl.