エフェクティブMeanings1na-adjectiveeffectiveLoanword used similarly to English 'effective', often in business, technical, or self-help contexts. Can describe methods, measures, or things that produce a desired result.この方ほう法ほうはとてもエフェクティブだ。This method is very effective.エフェクティブなコミュニケーションが大たい切せつです。Effective communication is important.