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Webster 1913 Edition

Adj.

Not leviable; incapable of being imposed, or collected.

[R.]

Sir M. Hale.

–

Illˊ-fa′vored-ly

adv.

–

Illˊ-fa′vored-ness

Noun.

Adj.

That cannot be levied or collected.

illeviable ‎(comparative more illeviable, superlative most illeviable)

Not leviable; incapable of being imposed or collected.
(Can we find and add a quotation of Sir M. Hale to this entry?)