Borrowed from Sanskrit किम् (kim, “what?”) + कर्तव्य (kartavya, “to be done, duty”) + विमूढ (vimūḍha, “perplexed, confused”), literally "confused about what to do".
किंकर्तव्यविमूढ़ • (kiṅkartavyavimūṛh) (indeclinable)
- (humorous) flabbergasted, bewildered, thunderstruck