xiā shuō
to talk drivel
to assert sth without a proper understanding or basis in fact
not to know what one is talking about
yuè xiāng
phases of moon, namely: new moon 朔[shùo], first quarter or waxing moon 上弦[shàng xián], full moon 望[wàng] and last quarter or waning moon 下弦[xià xián]