incapable (adj.)
Sentimentally I am disposed to harmony; but organically I am incapable of a tune.
The whole [Scotch] nation hitherto has been void of wit and humour, and even incapable of relishing it.
Th' ethereal mould
Incapable of stain would soon expel
Her mischief, and purge off the baser fire,
Victorious. Thus repuls'd, our final hope
Is flat despair.