watchword noun

/ˈwɒtʃ.wɜːd/

/ˈwɑːtʃ.wɝːd/ n [C usually singular]

Definition

(a word or phrase which represents) the main ideas or principles directing the way that someone behaves or the way that something is done

And remember, let caution be your watchword.

(Definition of watchword noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Synonyms and related words:

worried or nervous about something that is going to happen

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