English
afterload
From after- + load.
Proto-Indo-European *leyt- ‘to go, go forth’
…
Proto-Germanic *laidō ‘leading, way’
Proto-West Germanic *laidu
Old English lād ‘course, journey; carrying’
Middle English lode ‘way, course; burden’
English load
Today it means
noun The load on a working muscle from a constant opposing force
Language periods are conventional ranges, not dates for this word.
Etymograph / afterload