Meaning of 撞木反 in Japanese

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Definition of 撞木反

しゅもく(shumoku) 【撞木】

たん(tan) 【反 ·段 ·端】

(n, n-pref) variable measure of fabric (28.8 cm in width); for kimonos: at least 10 m in length; for haori: at least 7.27 m in length; for other clothes: at least 6.06 m in length
彼は階段を一度に三段ずつかけあがった。
He jumped up the steps three at a time.
300 tsubo (991.74 meters square, 0.24506 acres)
six ken (10.91 m)

はん(han) 【反】

(n, vs, n-pref) anti-; opposite; antithesis; antagonism
それは反道徳的だ。
It is still immoral.

しゅもくぞり(shumokuzori) 【撞木反り】