impartible
adjective
im·par·ti·ble (ˌ)im-ˈpär-tə-bəl 
: not partible : not subject to partition
an impartible inheritance
impartibly
(ˌ)im-ˈpär-tə-blē
adverb 
Word History
Etymology
Middle English impartibil, from Late Latin impartibilis, from Latin in- + Late Latin partibilis divisible, from Latin partire
First Known Use
14th century, in the meaning defined above