importance, weight / value

important, weighty / valuable

油断: negligence

油断: to be negligent

being unprepared

(Classical Japanese, archaic) entrust, leave / (Classical Japanese, archaic) abandon oneself to / (Classical Japanese, archaic) devote oneself to

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

indicates that something undesirable was done or happened

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

To do something completely (unintentionally); cannot help doing