I. ˈsik|sfōld adjective
Etymology: Middle English sexfold, from Old English sixfeald, from six + -feald -fold
1. : having six parts or aspects
2. : being six times as large, as great, or as many as some understood size, degree, or amount
a sixfold increase
II. adverb
: to six times as much or as many : by six times
increased sixfold