一切經音義 20.28

20.28

默然（忙北反顧野王云嘿不言也應劭云嘿嘿自不得意也古今正字從口黑聲亦作默考聲作嘿云嘿嘿志不遂也或作默）。

默然 ("silent"; [the former] fanqie: 忙 + 北. Gu Yewang says: "Mo (嘿) means not speaking." Ying Shao says: "Heihei (嘿嘿) means feeling disconsolate oneself." The Gujin zhengzi says: "It takes 口 as semantic and 黑 as phonetic; it is also written as 默." The Kaosheng writes it as 嘿, saying: "Heihei means one's ambitions are unfulfilled; it is also written as 默").