deadlock, standstill

(product development) project

project (planned endeavour)

adhesion / deadlock / (linguistics) agglutination

adhere / be at a deadlock

fall into, slide into / surrender / collapse, cave in, fall (i.e. castle)

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

fall in, lapse into, yield to

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