a. Obs. rare. [Illogical formation, from CHASTE a. + -FUL.] Chaste.

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1497.  Bp. Alcock, Mons Perfect., D iij. This worlde of virgyns and chastfull men.

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1567.  Turberv., Ovid’s Ep., 18 b. To winne the chastfull youth to filthie lust.

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