अवष्वन्avaṣvan1 P. To smack (one's lips), make a noise in eating.
1 Parasmaipada To smack (one's lips), make a noise in eating.
कोशःDictionaries
V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.