1. That cannot be held in possession; that cannot be maintained; not defensible.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• sustenable,
• unteneable,
• untinkable,
• unedable,
• undeinable,
• undenable,
• unwinable,
• undenaible,
• attenable,
• untangable,
• intengable,
• untainable,
• unopenable,
• unatanable,
• unthinable,
• undenyable,
• untennable,
• untable,
• undenible,
• undewable

• unattainable,
• unattainably,
• uniting,
• undeniably,
• untenanted,
• undeniable,
• untended,
• uneaten.

The adjective form of the word "untenable" is "untenable".

The plural form of the word "untenable" is "untenables".

The singular form of the word "untenable" remains as "untenable".