In 10 yearly cycles. Relating to decades.
“The warm fronts and hurricanes are decadal, we’re almost certain of that.”
Speak or act in an evasive way.
Mid 16th century (earlier ( Middle English) as prevarication and prevaricator), in the sense ‘go astray, transgress’: from Latin praevaricat- ‘walked crookedly, deviated’, from the verb praevaricari, from prae ‘before’ + varicari ‘straddle’.