Jisho

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Godan verb with 'su' ending, Transitive verb
1. to turn up (hem, sleeves, etc.); to fold back (e.g. page)
Godan verb with 'su' ending, Transitive verb
2. to turn back; to double back; to return
Godan verb with 'su' ending, Transitive verb
3. to loopback (a signal, message, etc.)Computing

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