unskillful (adj.)
- alert
- artless
- bad
- base
- black
- criminal
- deficient
- evil
- ill
- imperfect
- improper
- inaccurate
- inadequate
- inapt
- inattentive
- inauspicious
- incapable
- incompetent
- inefficient
- inept
- inexpedient
- inexpert
- inferior
- insufficient
- invalid
- little
- maladroit
- malevolent
- mean
- mediocre
- open-eyed
- peccant
- pedestrian
- petty
- poor
- shabby
- sinful
- sinister
- small
- thoughtless
- trivial
- unfavorable
- unhealthy
- unintelligent
- unkind
- unpleasant
- unqualified
- unready
- unskilled
- unsleeping
- untoward
- unworkmanlike
- vicious
- vigilant
- wakeful
- wicked
- wide-awake
- wrong
