The adjective indiscrete describes something that can't be divided into parts, like a piano you wish you could dismantle so it would fit through the doorway.
Frequently confused with the word indiscreet (-eet), indiscrete (-ete) has nothing to do with telling secrets. Instead it comes from the Latin indiscretus, meaning "not separate," and has evolved to describe a thing that's not dividable. An orange can be separated into slices (parts), but this isn't the case with a rock, which is an indiscrete.