To abandon, especially an unwanted baby in the wilderness.
To submit to an active (mostly dangerous) substance like an allergen, ozone, nicotine, solvent, or to any other stress, in order to test the reaction, resistance, etc.
To make available to other parts of a program, or to other programs.
To reveal, uncover, make visible, bring to light, introduce (to).
To subject photographic film to light thereby recording an image.
To cause to be in danger; to imperil; to risk.
A situation of serious and immediate danger.
An event which causes a loss, or the risk of a specific such event.
Something that causes, contains, or presents danger.