きんちょう
tension, strain, nervousness
Thread pulled until it will not give, and a bow drawn long. Two things at full stretch. A kin きん of yours chewing ちょう his nails while you speak, and your voice has gone elsewhere: きんちょう.
緊張する is to be nervous. Same 張 as 頑張る がんばる, where the stretch is effort rather than nerves.
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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.