What this suffix does
-age comes from Latin "-aticum" (related to, result of) via Old French "-age." It entered English through the Norman Conquest (1066) in a massive wave of French vocabulary. It forms nouns with several related senses: ACTION/RESULT: voyage (act of voyaging), passage (act of passing), drainage (act of draining). COLLECTIVE: foliage (all the leaves collectively), plumage (all the feathers), tonnage (total tons). CONDITION/STATUS: bondage (state of being bound), homage (condition of paying honour), courage (state of being courageous — from Latin "cor," heart).