English
interregulate
From inter- + regulate.
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *h₃reǵ- ‘to straighten’
…
Latin regō ‘to rule, govern’
Latin rēgula ‘rule’
Latin regulō ‘to direct, rule, regulate’
Latin regulatus ‘regulated, having been regulated’
English regulate
Today it means
verb To mutually regulate
Language periods are conventional ranges, not dates for this word.
Etymograph / interregulate