歯齦炎: gingivitis

(chiefly photography) silver salt; silver halide

(pathology) gingivitis

dentist

アルギン酸: alginic acid

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

To do something completely (unintentionally); cannot help doing

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

used in response to a failure or mistake: dang, shoot, darn it