Not to be believed
Not plausible or believable
A triennial sacrificial tithe is inconceivable when it is remembered that the tithe is only an extension of the firstfruits.
Not that one had anything to do with the other, but the technology of surrogacy would have been inconceivable back then.
The happiness before him appeared so inconceivable that if only he could attain it, it would be the end of all things.
It is inconceivable that one of the Twelve should have proceeded in this way in giving an account of Christ's ministry.
If it had followed that route in the course of nature, it is inconceivable that it would not still be found on some portions of the route.