ku-adjective (archaic)
Archaic ku-adjective meaning that nothing bad happens; the situation is calm and without incident.
An old waka poem says, 'The peace of mind that comes from thinking all is well.'
ku-adjective (archaic)
Archaic ku-adjective meaning something is easy to do or handle; not troublesome.
Archaic noun or na-adjective meaning free time or lack of occupation; often implies a state of leisure or boredom.
People long ago also used 事無し to mean 'easy' or 'simple.'
In Edo-period texts, the expression 事無しの身 (a person with nothing to do) can be found.
Compound of 事 (thing, matter) and 無し (archaic adjective meaning 'not exist'). The exact historical development is uncertain, but it likely originated as a phrase meaning 'there is nothing (bad)' and later lexicalized into an adjective and noun.