3
amateurish(inadequate, useless, immoral, inept, unable)
3
barren(inadequate, limited, feeble, useless, vain)
3
bungling(adjective, inadequate, useless, incompetent, unqualified)
3
counterproductive
3
disqualified(inadequate, useless, incompetent, unqualified, inept)
3
half ass
3
hopeless(adjective, weak, useless, incompetent, unqualified)
3
maladroit(adjective, inadequate, useless, unqualified, clumsy)
3
prodigal(adjective, well, extravagant, incompetent, lavish)
3
profitless
3
sterile
3
talentless(adjective, educated, overall, well-informed)
3
trifling
3
ungifted(adjective, educated, overall, well-informed)
3
unproficient(adjective, inadequate, useless, incompetent, unqualified)
3
unsuitable(adjective, weak, feeble, immoral, unprincipled)
3
untalented(adjective, educated, overall, well-informed)
2
amateur(adjective, inadequate, useless, incompetent, unqualified)
2
artless(incompetent, clumsy, inexpert)
2
bumbling(adjective, incompetent, clumsy, inexpert)
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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>