I. ˈ ̷ ̷| ̷ ̷ adjective
Etymology: Middle English twafald, twofold, from twa, two two + -fald, -fold -fold
1. : having two parts or aspects
the office of a clergyman is twofold : public preaching and private influence — R.W.Emerson
: double , dual , binary
2. : being twice as large, as great, or as many as some understood size, degree, or amount
a twofold increase
3. : diad
twofold symmetry
II. adverb
Etymology: Middle English twafald, twofold, from twafald, twofold, adjective
1. : to twice as much or as many : by two times
increased twofold
2. Scotland : so as to be doubled up or bent over (as with age)