וְאֶת־כָּל־חֵילָ֤ם וְאֶת־כָּל־טַפָּם֙ וְאֶת־נְשֵׁיהֶ֔ם שָׁב֖וּ וַיָּבֹ֑זּוּ וְאֵ֖ת כָּל־אֲשֶׁ֥ר בַּבָּֽיִת׃
All' ihr Gut, auch ihre Kinder und Weiber, nahmen sie gefangen und plünderten, sowie alles, was im Hause war.
Rashi on Genesis
חילם means THEIR WEALTH. Examples are: (Deuteronomy 8:17) “hath gotten me this (חיל) wealth”; (Numbers 19:18) “and Israel acquireth (חיל) wealth”; (Psalms 49:11) “and they leave (חילם) their wealth to others”.
Siftei Chakhamim
From the term שבייה. The accent is, therefore, on the latter syllable. But if the accent was on the first syllable, like with קמו and שבו, the root would be שוב. Then it would mean “returning.”