English

intermarine

From inter- + marine.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *móri ‘body of water, lake’

…

Latin marīnus ‘of the sea’

Old French marin

Middle French marin

Middle English marin

Today it means

adj Between seas.

Language periods are conventional ranges, not dates for this word.

Etymograph / intermarine