i Register
In some senses, portative is marked as archaic, obsolete, historical. Watch for register when choosing this word.
adj
Portable.
Was neuere leef vpon lynde · liȝter þer-after / And portatyf and persant · as þe poynt of a nedle.
Capable of holding up or carrying.
the portative force of a magnet, of atmospheric pressure, or of capillarity
noun
A portative organ.