2 sentences for 暢 (chàng — unimpeded)

1. 这支钢笔出水极畅，写起字来非常舒服。

   zhè zhī gāng​bǐ chū​shuǐ jí chàng, xiě qǐ zì lái fēi​cháng shū​fu.

   The ink flow of this pen is very smooth, making it very comfortable to write with.

   Source: Dong Chinese Dictionary

2. 由于血液循环不畅，他的手臂感到有些麻痹。

   yóu​yú xuè​yè xún​huán bù chàng, tā de shǒu​bì gǎn​dào yǒu​xiē má bì.

   Due to poor blood circulation, his arm feels a bit numb.

   Source: Dong Chinese Dictionary