ἴσαν

A. they went, 3 pl. impf. Ep. of εἶμι (ibo), Hom.
II. they knew, 3 pl. plpf. Ep. of οἶδα, Il. 18.405, Od. 4.772.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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