ದುಃಸ್ವಪ್ನ (Kannada) comes from Sanskrit दुःस्वप्न, from Sanskrit स्वप्न, from Proto-Indo-Iranian swápnas, from Proto-Indo-European swépnos, from Proto-Indo-European swopnos, from Proto-Indo-European swep- — to sleep.
ದುಃಸ್ವಪ್ನ (Kannada): nightmare