English
innerspring
From inner + spring.
Proto-Indo-European *h₁én ‘in’
…
Proto-West Germanic *in ‘in’
Old English in ‘in’
Old English innera ‘inner’
Middle English inner
English inner
Proto-Indo-European *sperǵʰ- ‘to hurry’
…
Proto-Germanic *springaną ‘to burst forth’
Proto-West Germanic *springan ‘to spring’
Old English springan ‘to spring’
Middle English springen
English spring
Today it means
adj That is constructed using springs enclosed within a padded fabric cover
Language periods are conventional ranges, not dates for this word.
Etymograph / innerspring