Matching prefixes

nonsupportive - supportive: giving help
nonassertive - assertive: expressing opinions and desires strongly and with confidence
noncreative
noncompetitive

impatient
impractical

uncommunicative
uncommitted
unco-operative
unreliable
unintelligent
unapproachable

irresponsible
irrational

insensitive
indescreet
inconsistent
inarticulate - articulate: express/explain your thoughts or feelings clearly in words
indecisive - decisive: very importand for the final result of a particular situation
insincere

dishonest
disloyal