効率的|こうりつてきkouritsuteki

1. na-adjectiveefficient
   効率的こうりつてきな機械きかいが肉体労働にくたいろうどうに取とって代かわった。↗

   Efficient machinery replaced manual labor.

• Synonym能率的のうりつてきWrittenA written, formal word for work proceeding smoothly and efficiently; 「効率的」 is more common in everyday use.
• Related経済的けいざいてきNeutralAbout saving money and being economical or thrifty; can also refer to the economy or finances. 「効率的」 stresses high output with little wasted time or effort.
• Related合理的ごうりてきNeutralMeans being in line with reason or logic, or cutting out waste; 「効率的」 focuses more on output efficiency.
• Related手際よくてぎわよくCasualA colloquial adverb for doing things deftly and skillfully; 「効率的」 is a na-adjective.
• Related効果的こうかてきNeutralMeans producing clearly visible results; 「効率的」 is about the input-to-output ratio rather than the effect.
• RelatedエコノミカルCasualA colloquial loanword whose focus is thrift and saving money; 「効率的」 puts the emphasis on efficiency itself.
• RelatedてきぱきCasualA colloquial mimetic word for brisk, snappy action; 「効率的」 is a na-adjective.
• RelatedぱっぱとCasualA colloquial adverb for quick, brisk action; 「効率的」 emphasizes efficient methods rather than speed.
• Antonym非効率的ひこうりつてきWrittenA written, formal word meaning inefficient; the direct opposite of 「効率的」.
• Antonym無駄の多いCasualA colloquial phrase meaning full of waste; the opposite of 「効率的」.

Use 「効率的」 for doing things with little waste — high output for the time and effort put in, as in 「効率的な方法」. For saving money or costs, choose 「経済的」 or 「エコノミカル」; for clearly visible results, 「効果的」; for brisk, nimble action, 「てきぱき」. The opposite is 「非効率的」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物事ものごとが無駄むだがなく効率こうりつがよいさま。