The word Hijab refers ‎to both the head covering traditionally worn by Muslim women and modest Muslim styles of dress ‎in general. The Arabic word literally means curtain or cover (noun). Most Islamic legal systems ‎define this type of modest dressing as covering everything except the face and hands in ‎public. According to Islamic scholarship, hijab is given the wider meaning of modesty, privacy, and ‎morality. the words for a headscarf or veil used in the Qur'an are khimār (‎خمار‎) and jilbaab (‎جلباب‎), ‎not hijab. Still another definition is metaphysical, where al-hijab refers to "the veil which separates ‎man or the world from God. The etymology and meaning, according to the Encyclopedia of Islam ‎and the Muslim World, the meaning of hijab has evolved over time. The term hijab or veil is not ‎used in the Qur'an to refer to an article of clothing for women or men, rather it refers to a spatial ‎curtain that divides or provides privacy. The Qur'an instructs the male believers (Muslims) to talk to ‎wives of Prophet Muhammad behind a hijab. This hijab was the responsibility of the men and not ‎the wives of Prophet Muhammad. However, in later Muslim societies this instruction, specific to the ‎wives of Prophet Muhammad, was generalized, leading to the segregation of the Muslim men and ‎women. The modesty in Qur'an concerns both men's and women's gaze, gait, garments, and ‎genitalia. The clothing for women involves khumūr over the necklines and jilbab (cloaks) in public ‎so that they may be identified and not harmed. Guidelines for covering of the entire body except ‎for the hands, the feet and the face, are found in texts of fiqh and hadith that are developed later.‎

By Shaykhul-Islaam Ibn Taymiyyah

Miserliness and jealousy are sicknesses that lead to the soul hating that which would benefit it, and its loving that which would harm it. This is why jealousy was mentioned alongside hatred and resentment in the preceeding ahaadeeth. As for the sickness of desire and passionate love then this is the soul loving that which would harm it and coupled with this is its hatred of that which would benefit it.