unintellectual (adjective) dull: unintelligent
Sinonime: addled, backward,
besotted,
boring, brainless, daffy,
daft,
dense,
dim, dim-witted, doltish,
dumb, feeble-minded, half-baked,
ignorant, imbecilic,
indolent, insensate,
low,
moronic, not bright, numskulled,
obtuse, scatterbrained,
shallow,
simple, simple-minded,
slow,
sluggish,
stolid,
stupid,
tedious,
thick, unintellectual,
vacuous, wearisome, witless
Antonime: intelligent,
keen,
sharp,
smart,
witty