Suddenly and unexpectedly
Without intending to do something, not on purpose
in secret
Without telling other people
in detail
at fault
Including all the information about something
out of character
in all
in advance
Responsible for something bad that has happened
Before a particular time
Altogether
When something happens because of luck
Unusual in terms of someone's personality
In a situation where something bad is likely to happen
out of nowhere
at risk
by accident