In other words, -able

• arable, adjective. Of soil, land: capable of producing crops; suitable for farming; suitable for the plow and tillage.
• cogitable, adjective. Thinkable; conceivable, able of being conceived.
• coursable, adjective. Of money, forms of payment, etc.: able to be used as currency; in circulation as a medium of exchange.
• fundable, adjective. Capable of being funded, or converted into a fund; convertible into bonds.
• impassable, adjective. Not passable; not allowing passage over, through, along, etc.; unable to be surmounted.
• implacable, adjective. Impossible to placate or appease; having determined feeling that will not change.
• inscrutable, adjective. Incapable of being investigated; difficult to understand or interpret; impenetrable.
• portable, adjective. Carried or moved with ease; able to be transferred from one employer to another. 
• potable, adjective. Of water, liquid: fit or suitable for drinking.
• ratable, adjective. Capable of being rated, estimated, or appraised.
• tenable, adjective. Capable of being held, maintained, or defended, as against attack or dispute.
• votable, adjective. Capable of voting, eligible to vote; capable of being voted upon.
• washable, adjective. Capable of being washing without damage.