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pawn; pawned article
pledge; security; guarantee
「質」 has other readings with different meanings.
この商品は質が良いと評判だ。
This product has a reputation for good quality.
戦後の苦しい時期、祖母は形見の指輪を質に入れて子の学費を工面したと、後年涙ながらに語った。
In the hard years after the war, my grandmother — as she later recounted in tears — pawned a ring left by her late kin to scrape together her child's school fees.
質より量を重視する人もいる。
Some people prioritize quantity over quality.