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To Tie Up
To Fasten, To Tie Together, To Bind
transitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means fasten and the verb vocab version is to fasten or to tie up or to tie together.
You are fastening up the coocoo (くく) clock, so the coocoo bird doesn't come out anymore. That annoying coocoo bird.
Why did you enclose this sentence in brackets?