the act of descending or falling into something

धंसना

English Usage: The sinking of the ship was a tragic event.

Hindi Usage: जहाज का धंसना एक दुखद घटना थी।

losing altitude or going down, often in a gradual manner

गिरता हुआ

English Usage: We watched the sinking sun as it set over the horizon.

Hindi Usage: हमने क्षितिज पर गिरते हुए सूरज को देखा।