Proto-IE: *rū-
Meaning: to heap up
Latin: ob-ruo, -rutus `to heap up'; rutus, -ūs m. `das Aufschlagen'; rutrum `Grabscheit, Schaufel', rutābulum `Ofenschaufel'
Russ. meaning: валить, наваливать, сгребать в кучу
References: WP II 351 f
Comments: Cf. similar roots: *(o)rewǝ- `move, agitate', *(o)rū- 'dig', with natural contaminations.