Untenable means impossible to defend or to keep up. An untenable position, become untenable, untenable in the long run.
It is the standard word for the moment before somebody resigns, since a position described as untenable is one they will shortly leave. The tenable in it means able to be held, from the Latin for holding.
1adjectiveuntenableImpossible to defend or to keep up.
“Rents rose so high that living in the city became untenable for young families.”
untenable is a quality.
French
tenable
English
tenable
English, today
untenable
Built from
From un- + tenable. tenable comes from the French tenable, from tenir (“to hold”); compare tenible.
Etymology from Wiktionary, CC BY-SA