まこと

Etymology
From. Originally from.

First appears in the  of 720 in sense 2.

Noun

 * 1) truth; reality; fact; genuineness
 * 2) sincerity; honesty; faithfulness
 * 1) sincerity; honesty; faithfulness

Adverb

 * 1)  truly, really, absolutely, indeed

Interjection

 * 1)  that's right