disintegration in mid-air / (by extension, of plans, etc.) falling apart

an airplane, aeroplane / (obsolete) Clipping of 空中飛行機 (kūchū hikōki): a flying machine

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

sister city

to disassemble, to break down / (chemistry) to resolve (light, a chemical, etc.) / (mathematics) to factor

disassembly, breaking down / (chemistry) resolution / (mathematics) factorization