Used to introduce a consequence or threat that will follow if the preceding instruction or condition is not met; synonymous with 'otherwise' in contexts implying negative outcomes.
2.
Globalneutralformal
Used to indicate an alternative or different possibility; synonymous with 'otherwise' without necessarily implying a threat.
3.
Globalinformalspoken
Used elliptically or as a trailing-off device to imply an unspecified or left-unsaid consequence or continuation.