I. ˈ ̷ ̷|fōld adjective
Etymology: Middle English, from ten (I) + -fold
1. : having 10 parts or aspects
2. : being 10 times as large, as great, or as many as some understood size, degree, or amount
a tenfold increase
II. adverb
: to 10 times as much or as many : by ten times
increased tenfold