Idioms and Phrases with with a will
with a will
Vigorously, energetically, as in He started pruning with a will. This term, first recorded in 1848, uses will in the sense of “determination.”
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.