I'm looking for a specific word, but I can't remember what it was. It begins with "a" I believe, and its definition is something along the lines of "successful in its endeavor, successful in its purpose". It's an adjective, and you would use it to describe something that was or would be successful in it's goal. For example, you could describe a product that did as it advertised using this adjective. I believe it's 3 or 4 syllables but I might be wrong.

EDIT: I was wrong. It began with "e". efficacious was the word I was looking for.

  • The one that comes to mind is "accessory", but that doesn't quite match that product bit. Commented Sep 9, 2015 at 0:31
  • Succeeded in his endeavor, achieved his purpose; accomplished his mission; attained his goal; actualized his dreams. Commented Sep 9, 2015 at 6:29
  • @Jeremy As a user of other SE sites, you will know that you can answer your own question (and even accept your own answer after a while). This marks the question in the list as answered.
    – Andrew Leach
    Commented Sep 9, 2015 at 6:42
  • Not a rip-off?
    – Anonym
    Commented Nov 24, 2015 at 18:24

1 Answer 1


efficacious: (typically of something inanimate or abstract) successful in producing a desired or intended result; effective.

That's what I was looking for.

  • 1
    You may also use "compliant" to describe a product meeting expected goals. (for an adjective beginning with a "a": perhaps adequate)
    – Graffito
    Commented Sep 11, 2015 at 21:22

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