[cata-] or cat- or cath- prefix [Gk kata-, kat-, kath-, fr. kata down, in accordance with, by; akin to OW cant with, Hitt katta]: down "cation" "cathode"
CATA-
Meaning of CATA- in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012