Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word seiugo could not be parsed. Trying a normal dictionary lookup:
sē-jŭgo, āvi, ātum, 1, v. a., to disjoin, part, separate, divide (very rare; mostly in part. pass.): quae specialiter antea sejugabantur, Macedonum nomini contributae factae sunt corpus unum, Sol. 9, § 1: si spiritus corpore suo semel fuerit sejugatus, App. M. 6, p. 180: (animi partem) non esse ab actione corporis sejugatam, * Cic. Div. 1, 32, 70: verba ab ordine suo, App. Mag. p. 325, 40: singulis granis rite dispositis atque sejugatis, id. M. 6, p. 177, 15.