Misty

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Old English mistig (see mist).

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From Middle English misty, mysty, misti, from Old English mistiġ(“misty, dark”), equivalent to mist +‎ -y. Cognate with Scots misty, mistie(“misty”), Dutch mistig(“misty, foggy”), Middle Low German mistich(“foggy”).

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misty (adj.)

Old English mistig; but the modern word is perhaps reformed in Middle English from mist (n.) + -y (2). From mid-14c. as "filled or covered with mist, overspread with mist;" early 15c. as "dim, obscure, or clouded as if by mist." Related: Mistily; mistiness.