English

Definition of -fold suffix from the Oxford Advanced Learner's Dictionary

(in adjectives and adverbs) multiplied by; having the number of parts mentioned to increase tenfold More Like This Suffixes -able, -age, -al, -ance, -ant, -arian, -ary, -dom, -ee, -er, -ese, -esque, -ess, -fold, -ful, -hood, -ify, -ion, -ish, -ism, -ist, -ista, -ite, -itis, -ize, -less, -let, -ling, -ly, -ment, -most, -ness, -oid, -or, -ous, -shipSee worksheet. Word Origin Old English -fald, -feald; related to fold ‘to bend something on itself’.
See the Oxford Advanced American Dictionary entry: -fold