1. not able to be maintained or defended against attack or objection

Examples

• His argument became untenable when new evidence emerged.
• The company’s financial position was untenable after the scandal.
• The general realized his military position was untenable and ordered a retreat.
• Her theory proved untenable under scientific scrutiny.
• The politician’s stance on the issue became increasingly untenable.
• Living conditions in the flooded area were untenable.