h₂eydʰ-
Possibly reanalyzed from a compound or suffixed verb *h₂éydʰh₁eti, from *h₂ey- (“to burn; fire”) + *-dʰh₁- (“to put, set”, later resultative suffix), literally “to put to fire”. For the root, see also *h₂éyos (“(copper?) metal, ore”), *h₂éyr̥ (“day, morning”) and Proto-Germanic *aisǭ (“fireplace”). Alternatively, the root can be identified as *h₁ay-, “to be warm, hot”, but this root is also contested and poorly evidenced.
*h₂eydʰ-
- to ignite
- fire