plural of burning question

(idiomatic) An important and pertinent question that urgently requires an answer.

A large convex lens or concave mirror that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface.

A large convex lens or concave mirror that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface.

To kill (someone) by tying them to a post and setting a fire beneath them

plural of sick burn

(idiomatic) To work studiously, especially late into the night.

(idiomatic) to harm oneself; to suffer consequences of one's actions.

A mild burn that causes redness of the skin but no blistering.

A severe burn that destroys skin and underlying tissue and exposes nerve endings.