エ

Particle

 * 1) yes

Etymology
From right-hand part of man'yōgana.

Syllable

 * 1)  The katakana syllable エ (ye). Its equivalent in hiragana is  (ye).

Usage notes
Historically represented the ye syllable, when was used in its place for what is currently represented by. In katakana representations of Old and Early Classical Japanese (when e and ye were phonemically distinct, prior to their merger in the mid-), ye is instead represented by, a invention, to avoid confusion with the modern use of  to represent e.