tetra-

• tetr- (before a vowel)

From combining form of Ancient Greek τέτταρες (téttares), τέσσαρες (téssares, “four”).

• IPA^(key): /ˈtɛtɹə/

tetra-

1. four.
   • 2006, Thomas Pynchon, Against the Day, Vintage 2007, p. 665: [cf. -latry]

     Which is how Kit first heard about the T.W.I.T. back in London, and of the ghostly neo-Pythagorean cult of tetralatry or worship of the number four, currently the rage in certain European circles

• quadri-

• Treat, atter, tater, teart, treat

• tetr- (before a vowel)

tetra-

1. tetra-

• quadri-

• tetracordo
• tetrade
• tetraedro
• tetragono
• tetrapode
• tetrarca
• tetrastico
• quattro