An unquenchable desire or appetite for something, typically pleasure or satisfaction that cannot be fully satisfied.

अपूर्णता की लालसा

English Usage: His insatiability for knowledge drove him to read every book he could find.

Hindi Usage: उसकी ज्ञान की अपूर्णता की लालसा ने उसे हर किताब पढ़ने के लिए प्रेरित किया।