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ועשתה את צפרניה. תְּגַדְּלֵם כְּדֵי שֶׁתִּתְנַוֵּל (ספרי; יבמות מ"ח): ועשת את צפרניה means, AND SHE SHALL LET GROW HER NAILS — She must let them grow, so that she should becomes repulsive to her captor (cf. Sifrei Devarim 212:4; Yevamot 48a; see also Rashi on Genesis 1:7 and our Note thereon).