(third-person singular simple present gums up, present participle gumming up, simple past and past participle gummed up)
"gum-up." YourDictionary, n.d. Web. 11 November 2018. <https://www.yourdictionary.com/gum-up>.
gum-up. (n.d.). Retrieved November 11th, 2018, from https://www.yourdictionary.com/gum-up
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