A children's game in which players take turns to place S's and O's on a grid, collecting points by creating an "SOS" sequence.
The conventional Morse code call made by a ship in distress.
A formal warning given as an alternative to prosecution in minor cases.
Security; guaranty; bail.
A yellow card.
Prudence when faced with, or when expecting to face, danger; care taken in order to avoid risk or harm.
A careful attention to the probable effects of an act, in order that failure or harm may be avoided.
To warn; to alert, advise that caution is warranted.
To give a yellow card