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Webster 1913 Edition

Verb.

To say wrongly.

To speak evil of; to slander.

[Obs.]

Verb.

To speak ill.

[Obs.]

Spenser.

Verb.

To say wrong; to slander. [Little used.]

Verb.

To speak ill.

missay ‎(third-person singular simple present missays, present participle missaying, simple past and past participle missaid)

(transitive, archaic) To speak ill of (someone).
(obsolete, intransitive) To say something erroneous; to speak wrongly.
- 1590, Edmund Spenser, The Faerie Queene, III.2:
  The worde gone out she backe againe would call, / As her repenting so to have missayd [...].

to say something wrongly