dull-witted, stupid, blockheaded, simple-minded ...1563 obs.
variant of 'duncical' from dunce
FIRST DOCUMENTED USE
1563 - See Example below
"...all those decretall letters, nothing sauouring of that age,
but rather of the latter dunsticall times that followed."
From: The Acts and Monuments of these Latter and Perillous Dayes"
By: John Foxe, 1563
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933
• A Dictionary of Archaic and Provincial Words,
James Halliwell, 1858