to swear
לְהִישָּׁבַע
In the present tense, “to swear” is נִשְׁבָּע (masculine), נִשְׁבַּעַת (feminine), נִשְׁבָּעִים (masculine plural) and נִשְׁבָּעוֹת (feminine plural). Root שׁ-ב-ע, binyan נִפְעַל.
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