Hindi-Urdu ghaṛī घड़ी (i.e. watch, clock) and ghaṛā घड़ा (i.e. an earthen water-pot) are closely related. Both derive from Sanskrit ghaṭa घट (pitcher of water). Their relationship can be traced to ancient times when water-clocks (जल यंत्र jala yaṁtra ) were used to measure time in India.
One ghaṛī घड़ी meant 24 minutes. It is because, this water-clock (i.e. a pitcher of a specific size) measured time in terms of precise 24 minutes, it took to discharge water from a hole in its bottom. Thus a day of 24 hours was measured in 60 cycles of 24 minutes each.
Another version of this clock was later used in India, in which a smaller empty pot with a hole at the bottom, was floated in a bigger pot filled with water, & the time of 24 minutes was measured by calculating how long the smaller one took to sink in the water.
Some hyponyms formed out of this archilexeme ”ghaṛī घड़ी” are following-
rēt-ghaṛī रेत-घड़ी = sand clock
dhūp-ghaṛī धूप-घड़ी = sun clock
pan-ghaṛī पन-घड़ी = water clock (mechanical)
ghaṛiyāl घड़ियाल = gong clock
ghaṛiyālī घड़ियाली = person appointed for time keeping, and sounding the gong clock at regular intervals.