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

sister city

a paper aeroplane

(idiomatic) A piece of cake; an extremely simple thing, something trivial, a cinch, easy as pie.

朝飯前: A piece of cake; an extremely simple thing.

(telephony) a common Japanese telephone greeting: hello; used when answering the telephone / used to confirm that the person being addressed is listening, or to confirm if anyone is listening

put away

falling in (like a cave in), collapse

to fall in, to cave in