The practice of swimming in a gap or hole in the ice of an iced-over body of water.

Permanent sea ice found in the Arctic and Antarctic

simple past tense and past participle of ice-skate

(idiomatic) In a dangerous, hazardous, or delicate situation; at risk.

(idiomatic) dangerously, hazardously, delicately

singular of ice pellets; a single pellet of sleet.

plural of ice pellet / Small hail, generally less than 5 mm (0.2 in) in diameter. / (chiefly Canada and US, meteorology) Sleet.

(simile) Very cold.

(physics) Any crystalline material in which the behavior of the magnetic moments is analogous to the behavior of the protons in water ice.

(sciences, uncountable) Ice made of frozen water; water in a solid physical state, especially when distinguished from other frozen substances. Contrast liquid water, water vapor.