Proto-IE: *(o)rewǝ-
Meaning: to move, to drive, to agitate
Tokharian: A rsu-, B räss- (PT *räsw-) 'tear out, off' (Adams 533)
Old Indian: roṣati, ruṣyati, ruṣati `to hurt, injure; to be hurt, offended', part. ruṣita-, ruṣṭa-
Old Greek: oróu̯ō `sich schnell erheben, auffahren, losstürzen'
Latin: ruō, ruī, ruitūrus, rutum/rūtum, ruere `stürzen, eilen', tr. `niederreissen'
Celtic: MIr ruathar `Ansturm', Cymr `id.', OIr rū(a)e `held'
Russ. meaning: двигать(ся), гнать, волновать(ся)
References: WP I 136 f
Comments: Cf. a similar root *rū- `heap up', but notice quantities in Lat t-forms.
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