Tang Rhymes (Tangyun) provides a pronunciation resulting in fei (falling tone). Collected Rhymes (Jiyun) provides a pronunciation resulting in fei (falling tone). The Jade Compendium (Yupian) defines it as brave and strong. Collected Rhymes (Jiyun) describes it as the appearance of being martial and brave. Furthermore, Collected Rhymes (Jiyun) provides a pronunciation resulting in bei (falling tone), which is the same as the sound of bei. The Extensive Verifications (Boya) defines it as to hold under the arm or coerce. Another interpretation is that it means strong. It was originally written in a variant form.