deficient

不足した、欠乏した

必要なものを十分に備えていない。

やさしい英語で： Not having enough of something that is needed.

• Her diet is deficient in iron.
• The soil was deficient in essential minerals.
• The report was deficient in useful detail.

使い方： deficient in something (These foods are deficient in protein.)

類義語： lacking

よく使う表現： deficient in iron, deficient in vitamins, deficient in skills

不十分な

量が少なすぎて、必要量や求められる水準に届かない。

やさしい英語で： Too small in amount to meet a need or reach a required level.

• Rainfall was deficient that year.
• A deficient water supply limited crop growth.
• The project failed because its funding was deficient.

類義語： insufficient, inadequate

反対語： sufficient, adequate

よく使う表現： deficient supply, deficient rainfall, deficient quantity

不足した

自分自身を除く正の約数の和が、その数より小さい。

やさしい英語で： Having positive divisors other than itself whose total is smaller than the number.

• Eight is a deficient number.
• Every prime number is deficient.
• The class compared deficient, perfect, and abundant numbers.

反対語： abundant

よく使う表現： deficient number, deficient integer