The prefix 'super-' is among the most widely used word-forming elements in English, appearing in hundreds of compounds ranging from medieval theological terms to comic-book neologisms. It descends from Latin 'super,' a preposition and prefix meaning 'above,' 'over,' 'beyond,' or 'in addition to.' The Latin word traces to PIE *upér, a comparative form meaning 'over, above,' itself derived from *upo (under, up from under).
The PIE root *upér is one of those rare etymological threads that connects words across nearly every branch of the Indo-European family. Greek 'hypér' (ὑπέρ, over, above) — the source of English 'hyper-' — is the direct Greek cognate of Latin 'super'; the two prefixes are the same word that diverged when the language families separated. Germanic *uber produced German 'über' and, through further evolution, English 'over.' Sanskrit 'upári' (above
In Latin, 'super' functioned both as a freestanding preposition (governing the accusative or ablative case) and as a prefix. As a prefix, it was enormously productive. 'Superbus' (proud, literally 'above-going') gave English 'superb.' 'Superfluous' (overflowing, from 'superfluus') combines 'super-' with 'fluere' (to flow). 'Superstition' (from 'superstitio,' literally 'a standing over') may have originally referred to the state of awe or dread at something inexplicable — standing over something in amazement or fear. 'Supervise' is literally 'to look over' (super- + vidēre, to see). 'Supersede' means 'to sit above' (super- + sedēre, to sit).
French, as a daughter language of Latin, inherited 'super' but wore it down through sound changes into 'sur-' and 'sou-.' English borrowed many of these French forms without recognizing them as 'super-' words: 'surface' (sur- + face, the part above the face), 'surplus' (sur- + plus, over and above), 'surpass' (sur- + passer, to go above), 'survive' (sur- + vivre, to live beyond), 'surprise' (sur- + prise, an overtaking, literally 'seized from above'). These everyday English words conceal the same Latin prefix that appears transparently in 'supernatural' and 'superhero.'
The standalone adjective 'super' — meaning 'excellent, wonderful' — is a twentieth-century development, an informal shortening that strips the prefix of its combining function and makes it an independent word of approval. This casual usage emerged in American English by the 1890s and became widespread by the mid-twentieth century.
The related Latin comparative 'superior' (higher, from 'superus,' upper) and superlative 'supremus' (highest, from which English gets 'supreme') show how the root moved through Latin's own system of gradation. 'Superior' entered English in the fourteenth century; 'supreme' in the fifteenth.
'Superlative' itself is a 'super-' word: from Latin 'superlativus,' from 'superlatus' (carried above, exaggerated), from 'super-' + 'latus' (carried, the irregular past participle of 'ferre,' to carry). A superlative is something 'carried above' all others.
The twentieth century saw an explosion of 'super-' compounds, many of them informal or commercial: 'supermarket' (1933), 'superhighway' (1925), 'superpower' (1944, in the geopolitical sense), 'superstar' (1920s), 'supercomputer' (1960s), 'superconductor' (1913). The prefix acquired a colloquial intensifying force — 'super-' became a way of saying 'very' or 'extremely,' detached from its spatial origin of 'above.' A 'superstar' is not literally a star above other stars; the prefix functions purely as an amplifier.
In scientific terminology, 'super-' retains more precision. 'Supersonic' (faster than sound), 'superconductor' (a material with zero electrical resistance), 'supernova' (an exploding star of extraordinary brightness), and 'superego' (Freud's term for the part of the psyche that stands above the ego as a moral authority) all use the prefix in its original sense of 'above' or 'beyond.'
The enduring productivity of 'super-' in English — spanning theology, physics, psychology, commerce, and slang — testifies to the power of the underlying spatial metaphor. 'Above' implies superiority, and superiority is something every domain of human thought needs to express.