This is the adverb twin of indescribable.

This is the adverb twin of indescribable這是indescribable的副詞雙胞胎。

You almost always put it in front of an adjective to say that quality is so strong you cannot really describe it: indescribably beautiful, indescribably sad, indescribably strange. It is a heavy “very,” a little dramatic.

You almost always put it in front of an adjective你幾乎都會把它放在形容詞前面，to say that quality is so strong you cannot really describe it來表示那個特質強到你真的很難形容：indescribably beautiful美到難以形容、indescribably sad難過到難以形容、indescribably strange怪到難以形容。It is a heavy 'very'它是加重版的「very」，a little dramatic有點誇張。

People use it in reviews, stories, and spoken English when they want to sound overwhelmed.

People use it in reviews, stories, and spoken English人們會在評論、故事，和口語英文裡用這個字，when they want to sound overwhelmed當他們想表現出被強烈感受淹沒的感覺時。

Though actually, it sounds odd if you leave it hanging after a verb with nothing after it — “She sang indescribably” is not how English usually works; you want “She sang indescribably well.” Same idea as the adjective, just stuck onto the next describing word.

Though actually不過其實，it sounds odd if you leave it hanging after a verb with nothing after it如果把它掛在動詞後面、後面什麼都沒接，聽起來會怪怪的——'She sang indescribably'「She sang indescribably」is not how English usually works不是英文（English）通常（usually）運作（works）的用法；you want 'She sang indescribably well'你會想說「She sang indescribably well」。Same idea as the adjective這跟形容詞的用法概念一樣，just stuck onto the next describing word只是黏到後面那個形容的字上。