• illaudable

    Not laudable; not praise-worthy; worthy of censure or disapprobation.

  • illegal

    prohibited by law or by official or accepted rules

  • illegible

    (of handwriting, print, etc.) not legible

  • illegitimate

    contrary to or forbidden by law

  • illiberal

    Not liberal; not free or generous; close; niggardly; mean; sordid.

  • illicit

    contrary to accepted morality (especially sexual morality) or convention

  • illimitable

    Incapable of being limited or bounded; immeasurable; limitless; boundless; as, illimitable space.

  • illiquid

    not easily converted to cash

  • illiteracy

    The state of being illiterate, or uneducated; lack of learning, or knowledge; ignorance; specifically, inability to read and write; as, the illiteracy shown by the last census.

  • illogical

    Ignorant or negligent of the rules of logic or correct reasoning; as, an illogical disputant; contrary of the rules of logic or sound reasoning; as, an illogical inference.

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