Meaning of -FOLD in English

-FOLD

■ suffix forming adjectives and adverbs from cardinal numbers:

1》 in an amount multiplied by: threefold.

2》 consisting of so many parts or facets: twofold.

Origin

OE -fald , -feald ; related to fold 1 .

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.