tenability

Concise Oxford English Dictionary © 2008 Oxford University Press:
tenable/ˈtenəbl/

▶adjective

• 1 able to be maintained or defended against attack or objection.

• 2 (of an office, position, etc.) able to be held or used: a scholarship tenable for three years.

– derivatives
tenability noun.

– origin C16: from Fr., from tenir ‘to hold’.