Not speaking english as my mothertongue, cellardoor (especially if said multiple times just as a single word) does not sound english or american at all. it has a more southern european sound. it could be italian or spanish. additionally it contains the letters DOR witch makes ist sound like 'gold', d'or, in latin languages like frensh or so.
I agree with both of you but i think the point was more the complexity and multiple meanings of the joining of these two words, which was also the cause of its beauty