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.
Entry विलपनम्
विलपनम्vilapanam1 Talking.
1 Talking.
Talking idly, chattering, prattle.
Lamenting, wailing; विलपनविनोदोऽप्यसुलभःUbbayapada (Parasmaipada and Atmanepada)3.3.