Answer: treadwater

AnswerCrossword Clue
TREADWATER

Make no progress

TREADWATER

Neither sink nor swim

TREADWATER

Stay afloat, in a way

TREADWATER
Stay afloat in place
TREADWATER
Remain upright, in the pool
TREADWATERMark time afloat.
TREADWATERStay afloat in a way
TREADWATERKeep afloat via leg action
TREADWATERGet along, but make no progress