60 entries under weak topic. ×

26
incapable(adjective, skill, inadequate, feeble)
18
unfit(adjective, dull, ability, flat)
16
ineffective(adjective, inadequate, useless, incompetent)
16
incompetent(adjective, ability, skill, awkward)
14
unqualified(adjective, ability, skill, inadequate)
14
ineffectual(adjective, skill, inadequate, limited)
14
powerless(adjective, skill, inferior, inadequate)
13
impotent(adjective, skill, inferior, inadequate)
13
inefficient(adjective, skill, inadequate, limited)
13
inept(adjective, dull, flat, slow)
10
inadequate(adjective, skill, inferior, limited)
9
disqualified(adjective, inadequate, useless, incompetent)
8
helpless(adjective, skill, awkward, inadequate)
7
inexpert(adjective, dull, flat, slow)
7
unskilled(adjective, dull, flat, slow)
6
ineligible(adjective, inadequate, useless, incompetent)
6
insufficient(adjective, inadequate, useless, incompetent)
4
futile(adjective, inferior, inadequate, limited)
4
incapacitated(adjective, skill, inadequate, useless)
4
not up to(expression, adjective, idiom, skill)
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APASmart Define. (2016). unable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unable/thesaurus/synonyms
ChicagoSmart Define. 2016. "unable thesaurus" https://smartdefine.org/unable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, unable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unable/thesaurus/synonyms>.
MLASmart Define. "unable thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/unable/thesaurus/synonyms>