しげき
stimulus, stimulation
Something goes in sharply and everything reacts hard. That quiz show does it to your brain, the same gecko げき as 攻撃 and this one bites: しげき.
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Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.