listen to the pronunciation of tenable
الإنجليزية - التركية
الإنجليزية - الإنجليزية
capable of being defended against assault or attack; defensible
capable of being maintained or justified; well-founded

Back in the 1800's, many did not consider Darwin's theory of evolution to be tenable at all.

{a} that may be held or maintained
based on sound reasoning or evidence; "a reasonable argument"; "well-founded suspicions
{s} resistant, may be carried out
based on sound reasoning or evidence; "a reasonable argument"; "well-founded suspicions"
If you say that an argument, point of view, or situation is tenable, you believe that it is reasonable and could be successfully defended against criticism. This argument is simply not tenable untenable. a belief, argument etc that is tenable is reasonable and can be defended successfully (tenir; TENANT)
Capable of being held, naintained, or defended, as against an assailant or objector, or againts attempts to take or process; as, a tenable fortress, a tenable argument
{i} capability of being maintained or defended, defensibility, reasonableness, plausibility
The quality or state of being tenable; tenableness
the quality of being plausible or acceptable to a reasonable person; "he questioned the tenability of my claims"
The property of being tenable
In a tenable manner
in a manner that can be defended; durably