- Definitions|2
- Thesaurus|364
- Abbreviations|0
32 entries under feeble topic. ×
| ineffectual(adjective, skill, affect, inadequate) | |
| vain(adjective, inferior, inadequate, useless) | |
| futile(adjective, inferior, inadequate, useless) | |
| unsuccessful(adjective, inferior, inadequate, limited) | |
| unproductive(adjective, inadequate, useless, trivial) | |
| inadequate(adjective, skill, useless, unfit) | |
| nugatory(adjective, inferior, inadequate, useless) | |
| feckless(adjective, inferior, inadequate, limited) | |
| null(adjective, inferior, inadequate, useless) | |
| incompetent(adjective, weak, skill, inadequate) | |
| unable(adjective, skill, inferior, inadequate, limited) | |
| unprofitable(adjective, inferior, inadequate, useless) | |
| idle(adjective, inferior, inadequate, useless) | |
| lame(adjective, inferior, inadequate, limited) | |
| unfruitful(adjective, inadequate, useless, vain) | |
| forceless(adjective, inferior, inadequate, limited) | |
| indecisive(adjective, inferior, inadequate, limited) | |
| inept(adjective, weak, skill, inadequate) | |
| inferior(adjective, inadequate, limited, useless) | |
| innocuous(adjective, inferior, inadequate, limited) |
For more, visit
Inefficacious on
Power Thesaurus
| APA | Smart Define. (2016). inefficacious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/inefficacious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "inefficacious thesaurus" https://smartdefine.org/inefficacious/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, inefficacious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/inefficacious/thesaurus/synonyms>. |
| MLA | Smart Define. "inefficacious thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/inefficacious/thesaurus/synonyms> |