järki

Etymology
From, of unknown further origin. The original sense can be seen in derived terms like. The sense of "order" would have later shifted to that which provides order, or sense, i.e. the faculty of reason.

Noun

 * 1) reason ability to think
 * 2) sense meaning, reason, or value of something
 * 3) sense sound practical judgment
 * 1) sense sound practical judgment