[end-] or endo- comb form [F, fr. Gk, fr. endon within; akin to Gk en in, OL indu, Hitt andan within--more at in] 1: within: inside "endoskeleton"--compare ect-, exo-
2: taking in "endothermic"
Merriam-Webster English vocab.Английский словарь Merriam Webster.2012