supereffective

adjective
su·​per·​ef·​fec·​tive | \ ˌsü-pər-i-ˈfek-tiv How to pronounce supereffective (audio) , -e-, -ē-, -ə-\

Definition of supereffective

: extremely effective a supereffective way to manage stress One of our chemical-free drugstore favorites, this oil-free sunscreen uses physical filters titanium dioxide and zinc oxide to form a supereffective sun-protective shield.— Stephanie Saltzman

First Known Use of supereffective

1909, in the meaning defined above

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The first known use of supereffective was in 1909

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