English
interliner
From inter- + liner.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Today it means
noun A protective layer between an external cover and a filling, especially as a fire barrier.
Language periods are conventional ranges, not dates for this word.
Etymograph / interliner