Having more than one decidedly dissimilar aspects or qualities:
— The office of a clergyman is twofold; public preaching and private influence.

synonyms: double, dual, three-fold, threefold, treble, two-fold.

Polish: dychotomiczny, dwoisty, dualistyczny

Twice as great or many:
— A twofold increase.

synonyms: double, doubled, two-fold.

Roget 90: double; doubled etc. v.; bicipital^†, bicephalous^†, bidental^†, bilabiate, bivalve, bivalvular^†, bifold^†, biform^†, bilateral; bifarious^†, bifacial^†; twofold, two-sided; disomatous^†; duplex; double-faced, double-headed; twin, duplicate, ingeminate^†; second.    ... show more

Polish: podwójny

By a factor of two:
— The price increased twofold last year.

synonym: two times.

Roget 90: twice, once more; over again etc. (repeatedly) 104; as much again, twofold.    secondly, in the second place, again.