get to the bottom of

Find the basic underlying quality or cause of something. For example, He was determined to get to the bottom of the problem. [Late 1700s] Also see at bottom.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

Related Words for get to the bottom of

penetrate, explore, unravel, fathom, delve, sound, search, gauge, measure, clear, free, resolve, solve, untangle, unsnarl