A word or phrase that serves as a warning or signal.

A guiding principle or concept.

मार्गदर्शक सिद्धांत

English Usage: "Her watch-word for success was perseverance."

Hindi Usage: "सफलता के लिए उसका मार्गदर्शक सिद्धांत धैर्य था।"

To keep an eye on something or to observe.

To monitor or follow a trend or development.

निगरानी करना

English Usage: "You should watch the market trends before investing."

Hindi Usage: "निवेश करने से पहले आपको बाजार के रुझानों की निगरानी करनी चाहिए।"