Genesis 7:16

וְ הַ בָּאִים זָכָר וּ נְקֵבָה מִ כָּל בָּשָׂר בָּאוּ כַּ אֲשֶׁר צִוָּה אֹתֹו אֶלֹהִים וַ יִּסְגֹּר יְהוָה בַּעֲדֹו

And those-who-come-in,²⁸⁴ a male and a female from the whole of the flesh, have come in when elohim has commanded him, and Yahweh is shutting in behind²⁸⁵ him.²⁸⁶

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Strong’s #1157 baad. Away from, from behind, in up to. The meaning is probably best summed up objectively in this verse,

And he is coming in, also the Hilt behind the Blade, and the Fat is shutting from-behind [baad] the Blade…” Judges 3:22 literal

The idea is the fat “closes in over behind the blade.”