Go bad
Go bad verb - Become unfit for consumption or use.
Both terms in one sentence
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Brave Fencer Musashi features food items that spoil over time — including milk that will go bad and then turn into yogurt.
Source: Poison Mushroom -
The latter can be justifiable if it's one of the cases of Never Be a Hero that has the helper be empowered by bad means, which in turn make them go bad because The Dark Side Will Make You Forget.
Source: Hero Harasses Helpers - After about 75 years, cars and other large machines will turn into almost unrecognizable piles of rust while the fuel, oil and other lubricants inside them will go bad long before that.
Source: Analysis / Ragnarok-Proofing
Cite this Source
Turn and Go bad. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/go_bad/turn
Go bad & Turn. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/go_bad/turn>.
Turn or Go bad. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/go_bad/turn.
Google Ngram Viewer shows how "go bad" and "turn" have occurred on timeline