和英辞書

太

prefix

added to words describing gods or the emperor or other exalted subjects to denote greatness or excellence / added to regular nouns to denote fatness or thickness

太陽が昇るのを見ました。

I saw the sun rise.

意味（1）

added to words describing gods or the emperor or other exalted subjects to denote greatness or excellence

c. 759, Man'yōshū (book 17, poem 4031); text here

奈加等美乃 敷刀能里⟨等其⟩等 伊比波良倍 安⟨賀⟩布伊能知毛 多我多米尓奈礼

意味（2）

added to regular nouns to denote fatness or thickness

太(ふと)腿(もも)、太(ふと)箸(ばし)

futo-momo, futo-bashithe thigh (the thick part of the leg), fat chopsticks (used at New Years)