Origin of -fold
suffix forming adjectives, suffix forming adverbs
Word Origin for -fold
multiplicative suffix, from Old English -feald, related to Old Norse -faldr; German -falt; Gothic falþs; Greek -paltos, -plos; Latin -plus, and to fold (v.). Crowded out in English by Latinate double, triple, etc., but still in manifold, hundredfold, etc.