A third-person singular or plural form of an archaic verb meaning to astonish or stupefy, used in older English texts.
From 'astony' (to astonish), with the '-s' conjugation for third-person singular verbs in archaic English. Part of the 'astond/astone/astony' family of obsolete terms.
This is what happens when old English verbs try to conjugate—'astonies' sounds like it should rhyme with 'Australias,' but it's actually a 400-year-old grammar lesson.
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