unefficacious
Fetched 2026-10-26 (cache).
Synonyms: inefficacious, efficacious
Antonyms: inefficacious, efficacious
Related words from Datamuse; suggestions, not definitions.
Adjective
- Not [[efficacious]].
Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.