To drink something a little at a time.

धीरे-धीरे पीना

English Usage: He likes to sip his coffee while reading.

Hindi Usage: उसे पढ़ते समय कॉफी का धीरे-धीरे पीना पसंद है।

The act of taking small drinks, usually of a beverage.

छोटे घूँट लेना

English Usage: She took a sip of her tea before speaking.

Hindi Usage: उसने बोलने से पहले चाय का एक छोटा घूँट लिया।