What is the etymology of the word バレる?


What is the etymology of the word バレる, and why is it often written with
katakana?

> ばれる(P); バレる (v1,vi) to leak out (a secret); to be exposed (a lie, improper
> behaviour, etc.) (behavior)
>
> その秘密はついにばれた。 The secret came to light at last.




The verb bare-ru is a 下一段 verb, so you can expect that it was 下二段 bar-u before
that, hence bar-u > bar-uru > bare-ru. It is noteworthy in that it begins with
a voiced consonant (b), which essentially does not happen in words of Japanese
origin. Rather, it is more likely that it is a recent contraction of another
word, which I assume was abare-ru (暴れる). And in fact, it is a recent verb with
early citations from the mid 17th century. Reasons to write it in katakana are
1) lack of kanji, 2) emphasis, 3) colloquial. Hiragana works just as well,
though.




The verb bare-ru is a 下一段 verb, so you can expect that it was 下二段 bar-u before
that, hence bar-u > bar-uru > bare-ru. It is noteworthy in that it begins with
a voiced consonant (b), which essentially does not happen in words of Japanese
origin. Rather, it is more likely that it is a recent contraction of another
word, which I assume was abare-ru (暴れる). And in fact, it is a recent verb with
early citations from the mid 17th century. Reasons to write it in katakana are
1) lack of kanji, 2) emphasis, 3) colloquial. Hiragana works just as well,
though.

