English
subsubproblem
From sub- + subproblem.
Formed from sub- + subproblem
Proto-Indo-European *upó ‘up; from below’
Proto-Italic *supo ‘under’
Latin sub ‘under, beneath, below’
English sub-
Today it means
noun A subproblem of a subproblem.
Language periods are conventional ranges, not dates for this word.
Etymograph / subsubproblem