te nə bəl
adjective
able to be upheld, affirmed, supported, or defended; logical.
When he finally did his research, he found to his disappointment that his argument was not tenable.
It sounds like something that would benefit us, but we’ll have to make sure it’s a tenable proposition.
able to be defended from armed attack.
If the enemy crosses the river, we will withdraw south to a tenable position.