structural:scholar_edition, structural:expansion
Etymology and definition

Guru (/ ˈ ɡ uː r uː /, UK also / ˈ ɡ ʊr uː, ˈ ɡ ʊər -/; Sanskrit: गुरु, Punjabi: ਗੁਰੂ, IAST: guru) is a Sanskrit term for a " teacher, guide, expert, or master" of certain knowledge or field. Bhai Vir Singh, in his dictionary of Guru Granth Sahib describes the term Guru as a combination of two separate units: "Gu;(ਗੁ)" meaning darkness and "Rū;(ਰੂ)" which means light. Hence, Guru is who brings light into darkness or in other words, the one who enlightens. Bhai Vir Singh 's definition provides further insight about Sikhi itself and explains why Guru Granth Sahib is considered the living Guru. The word Sikh is derived from the Sanskrit term shishya (Punjabi: ਸਿੱਖ) which means a disciple or a student. Thus, Sikhs have a student–teacher relationship with their Gurus since their teachings, written in Guru Granth Sahib, serve as a guide for the Sikhs.