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English word incredible comes from Latin ingratus (Thankless. Ungrateful. Unpleasant, disagreeable.), Latin credo
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ingratus (Latin)
Thankless. Ungrateful. Unpleasant, disagreeable.
credo (Latin)
(with accusative or dative) to believe, to trust in, to give credence to.. I commit, consign, entrust to.. Confide in, have confidence in.
credibilis (Latin)
Credible, worthy of belief, likely.
incredibilis (Latin)
Unbelievable, incredible.
incredible (English)
Amazing; astonishing; awe-inspiring.. Marvellous; profoundly affecting; wonderful.. Too implausible to be credible; beyond belief; unbelievable. [from 15th c.].