Definition of unrestless in English:
unrestless
(also onrastless)
adjective (ˌ)ʌnˈrɛs(t)ləs
1Restless; ill at ease; agitated. Now rare (chiefly United States regional in later use).
2Not restless; calm, peaceful.
Origin
Early 16th century; earliest use found in Gavin Douglas (c1476–1522), poet and bishop of Dunkeld. From un- + restless.