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Webster 1913 Edition

Unconceivable

Unˊcon-ceiv′a-ble

,

Adj.

Inconceivable.

[Obs.]

Locke.

–

Unˊcon-ceiv′a-ble-ness

,

Noun.

[Obs.]

–

Unˊcon-ceiv′a-bly

,

adv.

[Obs.]

Webster 1828 Edition

Unconceivable

UNCONCE'IVABLE

,

Adj.

Not to be conceived or understood; that cannot be comprehended.

[But inconceivable is chiefly used.]