English
insuperableness
From insuperable + -ness.
A compound of insuperable + -ness
Proto-Indo-European *upér ‘above’
…
Latin superus ‘above’
Latin superō ‘to surmount, overcome’
Latin superābilis ‘surmountable’
Latin insuperabilis ‘insurmountable’
English insuperable
Today it means
noun The quality of being insuperable or insurmountable; insuperability.
Language periods are conventional ranges, not dates for this word.
Etymograph / insuperableness