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cudgel

1 cudgel /ˈkʌʤəl/ noun
plural cudgels
1 cudgel
/ˈkʌʤəl/
noun
plural cudgels
Britannica Dictionary definition of CUDGEL
[count]
: a short heavy club

pick/take up the cudgels for

somewhat old-fashioned
: to fight in defense or support of (someone or something)
2 cudgel /ˈkʌʤəl/ verb
cudgels US cudgeled or British cudgelled US cudgeling or British cudgelling
2 cudgel
/ˈkʌʤəl/
verb
cudgels US cudgeled or British cudgelled US cudgeling or British cudgelling
Britannica Dictionary definition of CUDGEL
[+ object]
: to hit (someone or something) with a club usually used figuratively

cudgel your brain/brains

see 1brain