1. Not capable of being sounded or fathomed.

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

• ynsoundable,
• hnsoundable,
• jnsoundable,
• insoundable,
• 8nsoundable,
• 7nsoundable,
• ubsoundable,
• umsoundable,
• ujsoundable,
• uhsoundable,
• unaoundable,
• unzoundable,
• unxoundable,
• unsoundeable,
• unsounable,
• unsoundabel,
• unsooundable,
• unsounddable,
• unsoundabble,
• unsoundible

• uncomparable,
• uncombable,
• unaccountable,
• uncontrollable,
• uncounted,
• unconformable,
• uncompounded,
• unaccountably,
• unconcealed,
• unconsolable,
• unsoundness,
• unconscionable,
• unsounded,
• unjointed.

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

The plural form of the word "unsoundable" is "unsoundables".

The singular form of the word "unsoundable" is "unsoundable". The word does not change in its singular form, as it is an adjective that describes something that cannot be sounded or measured.