と仮定して[tokateishite] assuming that ...
と仮定しても[tokateishitemo] even assuming that ...
仮り[kari] temporary
仮に[karini] temporarily
仮にも[karinimo] even for an instant

仮の宿り[karinoyadori] temporary dwelling
仮の世[karinoyo] this transient world
仮の命[karinoinochi] this transient life
仮屋[kariya] temporary residence or shelter