The Thracian word per(u)-
Word per(u)-
Meaning rock

Other words that might be of interest
asas ‘stone’, bergas ‘hill, bank’, chalas ‘mud’, dun ‘mountain, hill’, haimos ‘ridge, mountain chain’, ida ‘tree, forest’, il(u) ‘silt, mud’, kapas ‘hill, slope’, kiri ‘mountain’, kurta ‘grove, wood’, rera ‘stones’, sem(e)la ‘land, earth’, skumbras ‘mountain, hill’, sula ‘grove’, carpatis ‘mountain’, Kogaionon ‘mountain name’