Incompossible

• (a.) Not capable of joint existence; incompatible; inconsistent.
Found on http://thinkexist.com/dictionary/meaning/incompossible/

Incompossible

In`com·pos'si·ble adjective [ Prefix in- not + compossible : confer French incompossible .] Not capable of joint existence; incompatible; inconsistent. [ Obsolete] « Ambition and faith . . . are . . . incompossible Jer. Taylor. -- In`com*pos`s...
Found on http://www.encyclo.co.uk/webster/I/35

incompossible

incapable of coexisting
Found on http://phrontistery.info/i.html
No exact match found