Idiotism

He did not perceive that regal power, in a few generations, introduces idiotism into the noble stem […]

Idiotism had long been accepted as hopeless: ‘Absolute idiocy admits of no cure,’ noted the nineteenth-century psychiatrist George Man Burrows (1771–1846).

[…] that clear soprano, in nursery, rings out a shower of innocent idiotisms over the half-stripped baby, and suspends the bawl upon its lips.