According to the Tang Rhyme (Tangyun), it is pronounced can (rising tone). According to the Collected Rhymes (Jiyun), it is pronounced jian (rising tone), which is the same as the rising tone of can. It means the appearance of shrinking or cowering. The Mystery of the Universe (Taixuanjing) by Yangzi contains the phrase meng can ju. The Jade Lexicon (Yupian) defines it as meaning to stab. Additionally, according to the Collected Rhymes (Jiyun), it is pronounced chan. It is pronounced the same as chan. The meaning is the same.