Etymograph

English

teinoscope

Teinoscope comes from Ancient Greek τείνω ‘I extend’, from Proto-Hellenic *téňňō ‘to stretch’, and ultimately from Proto-Indo-European *ten-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ten-1‘stretch’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*tén-ye-ti1reconstructedinnovative ye-present of *ten-
  3. Proto-Hellenicc. 2200–1600 BCE*téňňō1‘to stretch’reconstructed
  4. Ancient Greekc. 800–300 BCEτείνω2teínō‘I extend’
  5. Englishtodayteinoscope2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Ancient Greek τείνω
  2. 2 Wiktionary, English teinoscope

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*ten-Wiktionary, Ancient Greek τείνω‘stretch’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*tén-ye-tiWiktionary, Ancient Greek τείνωreconstructedinnovative ye-present of *ten-
  3. Proto-Hellenicc. 2200–1600 BCE*téňňōWiktionary, Ancient Greek τείνω‘to stretch’reconstructed
  4. Ancient Greekc. 800–300 BCEτείνωWiktionary, English teinoscopeteínō‘I extend’
  5. EnglishtodayteinoscopeWiktionary, English teinoscope

Formed from scope

Proto-Indo-European *speḱ- ‘to see, to look, to observe’

…

Ancient Greek σκέπτομαι ‘to look at, examine’

Ancient Greek σκοπός ‘watcher, lookout’

Late Latin scopus

Italian scopo ‘purpose’

English scope

Linked words

through Proto-Indo-European *ten- ‘stretch’

continue, content, tight, entertainment, maintenance, ton, tune, obtain, contain, tennis, retain, continuous, tender, detention, continent, sustain, retention, tenant, tonic, pristine, tendon, continuum, pertinent, abstinence, detain, tenor, rein, tenacity, abstain, tenacious, sustenance, tenet, tenement, countenance, incontinence, tantra, pertain, retinue, abstention, tenable, 69 more

through Ancient Greek τείνω ‘I extend’

tone, titanium, tetanus, hypotenuse, 8 more

Today it means

noun An instrument formed by combining prisms so as to correct the chromatic aberration of the light while linear dimensions of objects seen through the prisms are increased or diminished

Sources

Sources: Wiktionary, “teinoscope”; the older steps come from the Wiktionary entry for Ancient Greek τείνω. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *ten- / teinoscope

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