fall into, be caught in, trap / insufficient, mistake

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

fall in, lapse into, yield to

(philosophy, general) infinity, unlimitedness, endlessness / (mathematics) infinity

unlimited, infinite, endless

(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

to fall in, to cave in