Not confined within narrow limits; not restricted or restrained; released.
Origin
Late 16th century; earliest use found in Robert Greene (bap. 1558, d. 1592), writer and playwright. From un- + pent. In some cases probably influenced by unpend or unpen.
Definition of unpent in US English:
unpent
adjective(ˌ)ʌnˈpɛnt
Not confined within narrow limits; not restricted or restrained; released.
Origin
Late 16th century; earliest use found in Robert Greene (bap. 1558, d. 1592), writer and playwright. From un- + pent. In some cases probably influenced by unpend or unpen.