Where does “胸を張る” come from?

胸を張る (Japanese) comes from Japanese 胸, from Japanese い, from Japanese や, from Japanese じゃ, from Japanese である, from Japanese で, from Japanese ぜ, from Japanese ぞえ.

胸を張る (Japanese): to throw out one's chest; to be puffed up with pride

Definitions

  1. to throw out one's chest; to be puffed up with pride

Ancestry of “胸を張る”, step by step

胸を張る traces back through 3 separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesechest, breast; heart, inner thoughts; bosom,...
2JapaneseUsed in compounds with certain sentence-ending...
3Japaneseand/or; is, are; Alternative form of いや
4Japaneseじゃso, then—used for connecting to a reasonable...
5JapaneseであるTo be: the copula, with the same function as だ and its polite form です
6Japaneseat; with, by, using; indicating the following...
7Japanesesentence-ending particle signifying emphasis,...
8Japaneseぞえ­ sentence-ending particle signifying emphasis, used to lightly press one's point, with affectionate overtones
9JapaneseAlternative form of い
10Middle Chinese

via Japanese

StepLanguageWordMeaning
1JapaneseA case particle; A conjunctive particle, usually...
2Proto-Japonicwoaccusative marker; away from, off

via Japanese 張る

StepLanguageWordMeaning
1Japanese張るspread, fill; swell; put up, spread
Every word from Middle Chinese Every word from Japanese Every word from Japanese ぞえ