English
riverless
From river + -less.
Formed from river + -less
Proto-Indo-European *h₁reyp- ‘to scratch, tear’
…
Latin rīpārius ‘of a riverbank’
Early Medieval Latin rīpāria ‘littoral, riverbank’
Anglo-Norman riviere
Middle English ryver ‘a river’
English river
Today it means
adj Without a river or rivers.
Language periods are conventional ranges, not dates for this word.
Etymograph / riverless