To spring up; to come into action, being, or notice; to become operative, sensible, or visible; to begin to act a part; to present itself.
To come up from a lower to a higher position.
To come up from one's bed or place of repose; to get up.
To happen, take place.
Of plants, to give off water and waste products through the stomata.
To become known; to escape from secrecy.
To give off (vapour, waste matter etc.); to exhale (an odour etc.).