secret camera; hidden camera

(euphemistic) security camera

gaze directly at a camera

(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

a purple quartz; amethyst

the Crystal Palace

(anatomy) lens