dolt

[dohlt] /doʊlt/
noun
1.
a dull, stupid person; blockhead.
Origin
1535-45; variant of obsolete dold stupid, orig. past participle of Middle English dollen, dullen to dull
Related forms
doltish, adjective
doltishly, adverb
doltishness, noun
Synonyms
idiot, fool, clod, nitwit, dummy.
British Dictionary definitions for dolt

dolt

/dəʊlt/
noun
1.
a slow-witted or stupid person
Derived Forms
doltish, adjective
doltishly, adverb
doltishness, noun
Word Origin
C16: probably related to Old English dol stupid; see dull
Word Origin and History for dolt
n.

1540s, perhaps a variant of dold "dull, foolish," influenced by dulte, dolte, past participle forms of Middle English dullen "to dull, make or become dazed or stupid" (see dull (adj.)). Related: Doltish; doltishly; doltishness.