こそ

Etymology
From.

Possibly derived from +.

Particle

 * : it is ... that

Usage notes

 * cannot be after the predicate of a sentence. Thus, when emphasizing predicates, the structure "verbal noun + こそ + " must be used.
 * There is no direct translation, but it is roughly analogous to “precisely” or “the one that”. Compare the discourse particle.
 * There is no direct translation, but it is roughly analogous to “precisely” or “the one that”. Compare the discourse particle.

Etymology
Possibly derived from 🇰🇲.