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essential (EN)
形容詞、名詞

形容詞 “essential”

基本形 essential (more/most)
  1. 必要不可欠な
    Drinking clean water is essential for good health.
  2. 本質的な
    Freedom of speech is an essential principle of democracy.
  3. エッセンシャル(香りや味に関する)
    The essential oil from the lavender plant gives the soap its calming scent.
  4. 必須の(生物学において体内で合成できない)
    Certain amino acids are essential because our bodies cannot produce them.
  5. 本態性(医学、原因不明で発生する)
    The patient was diagnosed with essential tremor, which has no clear underlying cause.

名詞 “essential”

単数 essential、複数 essentials
  1. 必需品
    Food and shelter are essentials for survival.
  2. 基本要素
    The course teaches the essentials of computer programming.