Late 19th century; earliest use found in Matthew Arnold (1822–1888), poet, writer, and inspector of schools. After post-classical Latin superinenarrabilis.
Definition of superinenarrable in US English:
superinenarrable
adjective
rare
Utterly indescribable.
Origin
Late 19th century; earliest use found in Matthew Arnold (1822–1888), poet, writer, and inspector of schools. After post-classical Latin superinenarrabilis.