Hoarfrost is a thin white layer of ice that forms on things outside when it is very cold — on grass, car windows, gates, and the twigs of trees. It looks as if the world has been dusted with sugar, or as if the grass has grown white hair.

Hoarfrost is a thin white layer of iceHoarfrost是一層薄薄的白色冰that forms on things outside when it is very cold在很冷的時候結在戶外的東西上 — on grass, car windows, gates, and the twigs of trees——結在草上、車窗上、大門上，還有樹枝上。It looks as if the world has been dusted with sugar看起來就像世界被撒了一層糖，or as if the grass has grown white hair或是草長出了白頭髮一樣。

That 'white hair' idea is in the name: hoar is an old word for grey-white, the colour of old hair.

That 'white hair' idea is in the name這種「白頭髮」的意象就藏在名字裡：hoar is an old word for grey-whitehoar是個古老的字，意思是灰白色，the colour of old hair就是老人頭髮的顏色。

Though actually it is not snow, and it is not quite the same as frost from frozen dew. Hoarfrost grows as tiny ice crystals out of the water in the air, on surfaces that are already below freezing.

Though actually it is not snow不過其實它不是雪，and it is not quite the same as frost from frozen dew也跟露水結凍成的霜不完全一樣。Hoarfrost grows as tiny ice crystals out of the water in the airHoarfrost是空氣裡的水氣長成的一顆顆小冰晶，on surfaces that are already below freezing長在已經低於冰點的表面上。

You see it on still, freezing mornings.

You see it on still, freezing mornings你會在寧靜、結冰的早晨看到它。

The word sounds a little countryside or bookish; a lot of people just say frost. Weather people still like hoarfrost for the pretty, feathery kind.

The word sounds a little countryside or bookish這個字聽起來有點鄉村味、有點書卷氣；a lot of people just say frost很多人就只說frost。Weather people still like hoarfrost for the pretty, feathery kind氣象播報員還是喜歡用hoarfrost來講那種漂亮、羽毛狀的霜。

You may also see hoar frost (two words) or hoar-frost.

You may also see hoar frost (two words)你也可能看到hoar frost（分兩個字）or hoar-frost或hoar-frost。