<p><strong>Adjective</strong></p><ul><li>adequate to accomplish a purpose; producing the intended or expected result: effective teaching methods; effective steps toward peace.</li><li>Synonyms: competent, capable</li><li>Antonyms: useless, futile</li><li>actually in operation or in force; functioning: The law becomes effective at midnight.</li><li>producing a deep or vivid impression; striking: an effective photograph.</li><li>prepared and available for service, especially military service.</li></ul><p><strong>Noun</strong></p><ul><li>a member of the armed forces fit for duty or active service.</li><li>the effective total of a military force.</li></ul>