What is "endo-"

Endo- \En"do-\, End- \End-\ [Gr. 'e`ndon within, fr. ? in. See In.] A combining form signifying within; as, endocarp, endogen, endocuneiform, endaspidean.

word-forming element meaning "inside, within, internal," comb. form of Greek endon "in, within," literally "in the house of," from en "in" (see en- (2)) + base of domos "house" (see domestic).

pre. '''end-'''