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弱腰に見せる事、そして寒さでかじかんだ手を動かし、また時に緊張を解す意味合いがあります。 隠された意味は往時は隠匿されたものです。
First, movement has a deep meaning. It has the meaning of making you look weak, moving your hands that are stiff from the cold, and sometimes relaxing your nerves. Hidden meanings were hidden in the past.