English
makespan
From make + span.
Proto-Germanic *makaz ‘fit, suitable, agreeable’
Proto-West Germanic *mak ‘fit, suitable’
Proto-West Germanic *makōn ‘to make suitable; to build, make’
Old English macian ‘to make, build, work’
Middle English maken
English make
Proto-Indo-European *(s)pend- ‘to stretch’
Proto-Germanic *spannō ‘span, handbreadth’
Old English spann
Middle English spanne ‘a span’
English span
Today it means
noun The time difference between the start and finish of a sequence of jobs or tasks.
Language periods are conventional ranges, not dates for this word.
Etymograph / makespan