1. Root

 1.teu̯g, 1.steu̯g

2. Lexical meanings

 DE: in heftige Bewegung geraten

3. Comparative evidence

 Celtic, Germanic, Indic

4. Formally comparable roots

 1.steu̯, 1.steu̯d, 1.teu̯d, 1.steu̯p, 1.teu̯p, 1.strei̯g, 1.teu̯k, 1.teu̯s, 2.steu̯, 2.steu̯d, 2.steu̯g, 2.teu̯g, 2.strei̯g, 2.teu̯k, 2.teu̯p, 2.teu̯s, stebʰ, steg, stegʰ, stegʷʰ, steh₂, steh₂g, steh₂ǵ, stei̯b, stei̯g, stei̯gʰ, stei̯p, stel, stelb, stelg, stelh₂k, stelh₂ḱ, stelg, stelǵ, stembʰh₁, stembʰh₂, stembʰh₃, sten, stengʷ, stenh₂, ster, sterg, sterh₁, sterh₃, sterǵʰ, sterḱ, steu̯n, teu̯n, sti̯eh₁, sti̯eh₂, sti̯eh₃, strebʰ, strengʰ, strep, streu̯, streu̯g, teu̯h₁, teu̯h₂, teu̯h₃, teu̯h₂, teu̯h₂s, tu̯ei̯, tu̯ei̯s, tu̯ek, tu̯em, tu̯enk, tu̯er, tu̯erh₁, tu̯erh₂, tu̯erh₃, tu̯erḱ

5. Formally/Semantically comparable roots

 1.steu̯d, 1.teu̯d, 1.steu̯p, 1.teu̯p, 1.teu̯k, 2.steu̯g, 2.teu̯g, stei̯g, steu̯n, teu̯n

6. Revised root variants

7. Comments

 According to LIV 602, OInd. tuj- belongs to *(s)teu̯g- ‘in heftige Bewegung geraten’ along with Gr. στυγέω ‘hate’, ‘abhor’, ‘make hateful’. However, TOJ may be a root variant to TOD (from *(s)teu̯d-), cf. Low German stŭken, German stauchen ‘to compress’ (EWAia, 1: 650). Cf. also OInd. tóś-, which Gotō (1987: 166ff.) interprets as ‘sich antreiben’, ‘sich drängen’, ‘eilen’ and compares to OInd. tuj- and tud-/tod-.

8. References

LIV = Rix, Helmut et al. 2001. Lexikon der indogermanischen Verben: Die Wurzeln und ihre Primärstammbildungen. 2 Aufl. Wiesbaden: Dr. Ludwig Reichert Verlag.