60 entries under feeble topic. ×

25
inept(adjective, weak, ability, inadequate, limited)
24
incompetent(adjective, weak, ability, thin, delicate)
21
ineffectual(adjective, weak, thin, delicate, failure)
16
incapable(adjective, weak, ability, inadequate)
16
useless(adjective, weak, failure, inferior, affect)
12
unable(adjective, weak, skill, inadequate, limited)
9
futile(adjective, weak, inferior, inadequate, limited)
7
impotent(adjective, weak, thin, delicate, failure)
7
inadequate(adjective, weak, thin, delicate, inferior)
7
inferior(inadequate, limited, useless, vain)
7
unavailing(weak, failure, inferior, inadequate, limited)
7
unproductive(adjective, weak, slow, inadequate, limited)
6
helpless(adjective, weak, thin, delicate, inadequate)
6
unprofitable(adjective, inferior, inadequate, limited)
6
worthless(adjective, inferior, inadequate, limited)
5
faulty(adjective, weak, well, incompetent)
5
insufficient(adjective, weak, thin, delicate, failure)
5
poor(adjective, weak, thin, delicate)
4
abortive(failure, inferior, inadequate, limited)
4
bootless(failure, inferior, inadequate, limited)
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APASmart Define. (2015). inefficient thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/inefficient/thesaurus/synonyms
ChicagoSmart Define. 2015. "inefficient thesaurus" https://smartdefine.org/inefficient/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, inefficient thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/inefficient/thesaurus/synonyms>.
MLASmart Define. "inefficient thesaurus" 12 November 2015. Web. 22 September 2026. <https://smartdefine.org/inefficient/thesaurus/synonyms>