An alert or sign indicating danger or the need for caution.

A metaphorical term used to signify a warning or indication of trouble ahead.

दुख या परेशानी का संकेत देने वाला एक उपमा।

English Usage: His sudden silence was a warning bell that something was wrong.

Hindi Usage: उसकी अचानक चुप्पी खामोशी का संकेत था कि कुछ गलत है।