watchword

Now I’ve endeavored to be like an old dog who can learn new tricks, so humility has been the watchword for my second decade of marriage.

“Unpredictability” will be a predictable weather watchword throughout all of our lifetimes.

After years of argument and dispute about the meaning of gender, the watchword of Wednesday's Supreme Court ruling has to be clarity.

The limits of these "vital interests" have always been left deliberately vague – ambiguity and credibility being the two watchwords of nuclear deterrence.

Memory was the watchword of this day, marked around the world as International Holocaust Memorial Day.