續一切經音義 10.43

10.43

昊天（上胡老反爾雅云夏為昊天郭注云言氣晧旰也說文作昦從日夰聲夰音晧下天字釋名云以舌腹言之天顯也在上高顯也又天之言坦也坦然高遠故字從一大也旰音月旦反）。

Vast Heaven (昊天: the first character is [pronounced with the fanqie] hu + lao; the Erya says: "Summer is Vast Heaven [昊天]"; Guo's commentary says: "Meaning that the pneuma is bright and brilliant"; the Shuowen writes it as 昦, formed from sun [日] with gao as phonetic; gao is pronounced hao; as for the second character, heaven [天], the Shiming says: "Spoken with tongue and belly, tian [heaven] means 'manifest' [xian]; it is high and manifest above; furthermore, tian means 'level and wide' [tan]; being level, wide, lofty, and distant, the character is formed from one [一] and great [大]"; gan is pronounced with the fanqie yue + dan).