To remain afloat in the water without use of any buoyancy aid, by using kicking motions and hand motions. / (figuratively) To make no progress, expending effort just enough to maintain a stable position.

simple past tense and past participle of tread water

Third-person singular simple present indicative form of tread water

present participle of tread water

Cnidoscolus stimulosus, the spurge nettle. / Solanum carolinense, the Carolina horsenettle.

To press out with the feet; to press out, as wine or wheat.

Synonym of walk on eggshells

(idiomatic) To exercise precaution; to be careful with regards to the situation.

(humorous or dated, figuratively) To work as an theater actor.

Third-person singular simple present indicative form of tread the boards