This is the 5400th most frequent Russian word.
пар
Steam.
In this sentence, 'пар' refers to steam or vapor, a physical state of matter.
Пар поднимается с поверхности воды.
Steam rises from the surface of the water.
Here, 'пар' is used metaphorically to describe something intangible likened to steam.
Тревога поднималась, будто пар, устремляющийся к небу.
Anxiety rose, like steam rushing to the sky.
In this sentence, 'пар' describes the visible vapor created from exhalation in cold weather.