The difference between Essential and Unnecessary

When used as adjectives, essential means necessary, whereas unnecessary means not needed or necessary.

Essential is also noun with the meaning: a necessary ingredient.

check bellow for the other definitions of Essential and Unnecessary

  1. Essential as an adjective:

    Necessary.

  2. Essential as an adjective:

    Very important; of high importance.

  3. Essential as an adjective (biology):

    for survival but not by the organism, thus needing to be ingested

  4. Essential as an adjective:

    Being in the basic form; showing its essence.

    Examples:

    "Don’t mind him being grumpy. That’s the essential Fred."

  5. Essential as an adjective:

    Really existing; existent.

  6. Essential as an adjective (of a [[lamination]] of a 3-[[manifold]]):

    Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.

    Examples:

    "rfex difference between 1 and 2"

  7. Essential as an adjective (medicine):

    Idiopathic.

  1. Essential as a noun:

    A necessary ingredient.

  2. Essential as a noun:

    A fundamental ingredient.

  1. Unnecessary as an adjective:

    Not needed or necessary.

    Examples:

    "The automatic child-frightener made clowns unnecessary."

  2. Unnecessary as an adjective:

    Done in addition to requirements; unrequired.

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