English
interstrain
From inter- + strain.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *strew- ‘to spread, strew’
Proto-Germanic *streuną ‘heap, treasure, profit, gain’
Proto-West Germanic *streun
Old English strēon ‘gain, acquisition, treasure’
Middle English streen
English strain
Today it means
adj Between strains
Language periods are conventional ranges, not dates for this word.
Etymograph / interstrain