combinable

adj

1. Able to be combined.

   “For instance, liquids are the most 'combinable' of all bodies — because, of all divisible materials, the liquid is most readily adaptable in shape, unless it be viscous.”

   “Candidate tasks cannot be too difficult or too easy, but they have to be divisible or combinable, so that they can be broken down into smaller chunks that can be solved independently by a potentially large group of contributors.”