Ancient Greek τετράς

← Ancient Greek τέσσαρες (mention)

← Ancient Greek -ᾰ́ς (affix)

← Proto-Indo-European *kʷetwóres (derived)

→ English tetrahedron (mention)

→ English tetrad (derived)

→ English tetraplicate (mention)

→ English tetrastoon (mention)

→ English tetradarchy (mention)

→ Greek τραπέζι (mention)

→ Ancient Greek δυάς (mention)

→ Ancient Greek δεκάς (mention)

→ Ancient Greek πεμπτάς (mention)

→ Ancient Greek πεντάς (mention)

→ Hungarian tetraéder (mention)

→ Kazakh тетраэдр (derived)

→ Portuguese tetraedro (mention)

→ Russian тетрадь (mention)

→ Old Armenian տետր (borrowed)