Recently I discovered the numeral adjective 'tenfold'. Now I realise that one may also say 'twofold', 'fivefold', 'elevenfold', 'nineteenfold' and 'twentyfold'. My concern though is how to form numeral adjective for higher complex numbers starting form twenty-one. Is 'twenty-onefold' a correct word? How about 'one-hundred-and-twenty-onefold'? Is it right spelling?
g. "twenty-one-fold".
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With hyphenated numbers, I would also hyphenate the "-fold" part; e.g. "twenty-one-fold".
lukand Is 'twenty-onefold' a correct word?
I suppose, but I have never encountered it in actual usage.
I have seen twentyfold, fiftyfold, hundredfold and a thousandfold, but never anything like sixty-eight-fold.
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