Dézhī fùqīn qùshì de xiāoxi, tā xīnzhōng de bēitòng nányǐ yánbiǎo.
Upon hearing of her father's death, the grief in her heart was beyond words.
Tips
usage
难以言表 is often used to express extremely strong emotions - joy, grief, or awe - that feel too intense for words. It can be used for both positive and negative feelings.