And with his head still turned, Andrew felt a shock and flounder.
Let dear Aristide flounder about; this only moulds young people.
What we've done so far, you might best describe as flounder.
If there was a sump-hole in sight, that horse was sure to flounder into it.
Only when she came to describe Bim and to tell of what he said, did she flounder.
I have floundered ...