一切經音義 70.6

70.6

諸冥（莫庭莫定二反說文冥幽也幽闇也冥夜也夜無所見也字從日從六日數十六日而月始虧冥也冖聲冖音銘壁反）。

All darkness (諸冥: has the two fanqie mò + tíng and mò + dìng. The Shuowen says: '冥 means secluded; dark and dim. 冥 also means night; at night nothing can be seen. The character is derived from 日 [sun] and 六 [six]; counting six days after the tenth day, the moon begins to wane, which is 冥; 冖 is phonetic'; 冖 has the sound of the fanqie míng + bì).