It may not always be obvious in everyday life — where the word すごい forms about 86.93% of what people say to each other — but Japanese has a very rich and precise vocabulary that can sometime refer to extremely particular phenomenons in the world.
One such word is 虎落笛, which is read もがりぶえ and means "winter wind whistling through a bamboo fence" (this is the definition on Jisho.org). It serves as a winter season word (季語, kigo) in haiku poetry.
The kanji compound 虎落 originally meant "bamboo fence" in Chinese, and this is why it's used here too; but the word もがり itself is of unknown origin. 笛 (ふえ), on the other hand, is the straightforward noun "whistle". Put together, they give us "bamboo-fence-whistle". This "whistle" is actually the fence itself when winter wind passes through the narrow gaps between the bamboo stalks, which creates sharp whistling sounds.
The first time I had ever seen this word was a couple of days ago, in a haiku poem by Takahama Kyoshi (高浜虚子). Here is the poem with its pronunciation:
もがりぶえ ねむりにおちる こどもかな
Here is one possible translation that attempts to preserve the original structure:
Wind whistling through a bamboo fence; falling asleep — a child.
Described in some more detail, the scene is one where freezing winter wind is blowing noisily through a bamboo fence while a child is dozing off and apparently manages to fall asleep despite the noise. Just the kind of subtle event that haiku poetry cares about.
Other than 虎落笛, the only unusual thing here is the way ねむり is written as 眠, without the okurigana り. Normally this would be spelled 眠り, but in poetry it's common to shorten words like this in writing.
By the way, as far as haiku is concerned, winter is about to end, because 立春 (りっしゅん, the beginning of spring) is just around the corner, on February 3. From that day on, winter kigo become automatically outlawed and spring kigo take their place. Use all of your spare season words now, or face the consequences!
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