/ˈɡʊruː/·noun·1613 CE — recorded in English in the travel writings of Edward Terry and contemporaneous East India Company documents, referring to Hindu religious preceptors. The extended secular sense of 'expert' emerged in the 1960s with the Western reception of Indian spiritual teachers.·Established
Origin
Sanskrit guru (गुरु, 'heavy, teacher') descends from PIE *gʷerh₂- ('heavy'), making it the same word as Latin gravis (→ gravity, grave) and Greek barys (→ barometer, baritone) — a word meaning 'heavy' that English now uses to mean 'expert.'
Definition
A venerable teacher or spiritual guide, from Sanskrit guru (heavy, weighty, venerable), from PIE *gʷerh₂- (heavy), cognate with Latin gravis and Greek barys.
The Full Story
Sanskritc. 1500 BCE – 500 CEwell-attested
Theword 'guru' descends from the Proto-Indo-European root *gʷerh₂-, meaning 'heavy' or 'weighty.' This ancient root is one of the most semantically productive in the Indo-European family: it gave Latin 'gravis' (heavy, serious), from which English derives gravity, grave, and aggravate; Greek 'barys' (heavy), the source of barometer, baritone, and barium; and Avestan 'guru' with a parallel sense. In Sanskrit, the root yielded 'guru' (गुरु), carrying the primary physical sense
Did you know?
Gravity, grave, grief, guru, baritone, and barometer are all the same word. They all descend from PIE *gʷerh₂- ('heavy'). Latin took it as gravis (→ gravity, grave, aggravate, grief); Greek took it as barys (→ baritone = 'heavy voice', barometer = 'weight-measure'); Sanskrit took it as guru. When a tech journalist calls
. The guru in Hinduism occupies a position of profound soteriological importance: the Upanishads establish the guru-shishya (teacher-disciple) relationship as the primary vehicle for transmitting esoteric knowledge. In Sikhism, 'Guru' became a title of supreme religious authority, applied to the ten founding masters from Guru Nanak through Guru Gobind Singh, and ultimately to the Guru Granth Sahib, the living scriptural Guru. The word entered English via Orientalist scholarship of the 17th and 18th centuries and was popularised in Western popular culture during the 1960s counterculture. Key roots: *gʷerh₂- (Proto-Indo-European: "heavy, weighty"), guru (गुरु) (Sanskrit: "heavy → venerable → teacher"), gravis (Latin: "heavy, serious, weighty (true cognate from PIE *gʷerh₂-; source of gravity, grave)"), barys (βαρύς) (Ancient Greek: "heavy (true cognate from PIE *gʷerh₂-; source of barometer, baritone)").