What do "endonde" and "andas" mean ?
Hi and welcome to the forum.
Could it have been "¿Adónde andas?" (Where are you off to? Where are you going?)
Endonde sort of means "where at" or " 'in what place.' Usually, saying donde is enough. Andas comes from andar=to walk or to travel,or be. I suspect someone said, ¿endonde andas? Attempting to say where are you, but ¿donde andas? will usually suffice. Unfortunately people do not always use the correct form of words, in any language. I'm sure you've heard someone say in English, where are you at?
en dónde - incorrect; endonde - incorrect also This sounds like a question asking where the person is roaming about. Typically used by native speakers who make grammatical mistakes just like English speakers make grammatical mistakes in everyday speech. So the correct way to ask that question is ¿Dónde andas?
andar - to go about is the literal translation. Hard to translate andar. ¿Dónde andas? - Where are you roaming? Adónde = where to always used with the verb to go, eg., ¿Adónde vas?