* Formal: The professor's lecture was filled with jargon, making it incomprehensible to anyone outside the field.
* Informal: My toddler's babbling is often incomprehensible, but I swear I can sometimes understand what he wants.
* Literary: The ancient inscription on the stone tablet remained incomprehensible, defying all attempts at translation.
* Humorous: The directions on how to assemble the furniture were so incomprehensible that I ended up with a chair that looked like a birdcage.
* Descriptive: After the accident, the victim was in shock and spoke in incomprehensible mumbles.