To let something fall or to fall.

गिराना

English Usage: Please don't drop the glass.

Hindi Usage: कृपया गिलास मत गिराओ।

A fall or descent, especially a sudden one.

गिरावट

English Usage: The drop in temperature surprised everyone.

Hindi Usage: तापमान में गिरावट ने सभी को हैरान कर दिया।

Relating to a reduction or decrease.

कम

English Usage: We discussed the drop rate of sales this quarter.

Hindi Usage: हमने इस तिमाही में बिक्री की कम दर पर चर्चा की।

In a manner that indicates a decrease or lessening.

कम करके

English Usage: The stock prices dropped drastically.

Hindi Usage: स्टॉक की कीमतें कम करके गिर गईं।