become blunt / decline in ability or energy, lose one's edge

become blunt / decline in ability or energy, lose one's edge / lose skill, decline in competence, get rusty

過ぎる: (auxiliary) too, too much; to exceed, to go beyond something

to exceed; to surpass / to be too much; to be excessive

to use / to employ / to make use of, to apply / to spend

a Western knife, table knife

indicates that something undesirable was done or happened

to close / to finish, do something completely / to put away, to put an end to / is, or was (with conjugation), done completely / happens, or happened, unexpectedly / is done with difficulty

traditional folk song of Amami / (more broadly) traditional folk song of Okinawa

To do something completely (unintentionally); cannot help doing