blockish
inadequacy
nonintelligent
unintelligent
nondescript
halfwit
foresightless
unforesighted
naive
cloistered
dullness
parviscient
unsophisticated
unforesightful
shortsighted
uncharismatic
noncomprehension
myopic
not the sharpest knife in the drawer
not the sharpest tool in the shed
noncharismatic
not the sharpest tool in the box
short
dissociable
unmindful
mindless
unerudite
vacant
unsmart
half-witted
ill-informed
vacuous
nonrecognition
oblivious
inerudite
insociable
unastute
unintelligence
incogitative
inexpertness
famelessness
incognizance
four oh four
unintrigued
unforethoughtful
rude
unimpressible