burdenlessadj.
Etymology: < burden n. + -less suffix.Previous versions of the OED give the stress as: ˈburdenless.
the world > action or operation > easiness > [adjective] > not onerous or burdensome > not burdened
1858 J. Thomson (1881) 177 Now thine heart is burdenless.
This entry has not yet been fully updated (first published 1888; most recently modified version published online June 2019).