Standard Lemma guide

efficaciously

adv · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adv

Meaning 1

in an efficacious manner

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adverb

Meaning 2

in an effective manner

Definition source: Princeton WordNet 3.0

Examples

  • these are real problems that can be dealt with most effectively by rational discussion

Meaning relationships

Synonyms: effectively

Antonyms: inefficaciously

History

Etymology

Etymology tree English efficacious Middle English -ly English -ly English efficaciously From efficacious + -ly.

Across languages

Translations

4 source translations are retained for this English entry.

  • Italian: efficacemente — in an efficacious manner
  • Latin: efficāciter — in an efficacious manner
  • Portuguese: eficazmente — in an efficacious manner
  • Russian: эффективно (effektivno) — in an efficacious manner