BDB1709
מְגִנָּה noun feminine covering, מְגִנַּתלֵֿב Lam 3:65 covering of heart, i.e. a hard shell about the heart = obstinacy, so Ges (compare Qor 6:25 [untranscribed source text 970]) RV ; or, covering of the understanding, blindness of the heart, so Ew Ke Näg Che.