Diminish Someone's Authority
This page is the CodyCross answer for the clue below from Art Museum, Group 733, Puzzle 4 (Uffizi Gallery).
Question is: Diminish Someone's Authority
and the answer is: UNDERMINE
Word Meaning:
UNDERMINE — To dig underneath (something), to make a passage for destructive or military purposes; to sap.
Definitions from Wiktionary.