ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English waccheword, from wacche watch + word
1.
a. : a secret word that is used as a signal permitting a person to pass a guard : password
stealthy guests have secret watchwords, private entrances — Robert Browning
b. : a word or phrase used as a sign of recognition among members of the same society, class, or group
2. archaic : a prearranged signal for attack or other action
3. archaic : a watchman's call
4.
a. : a word or motto that embodies a principle or guide to action of an individual or group : slogan
the watchword of the conservative is “order” — H.N.Maclean
“death rather than crime”, such is the good man's watchword — W.E.Channing
b. : a guiding principle
make cost reduction through production efficiency your watchword — Successful Farming