Unit 10: Unit 10 cudgel noun [C] a short heavy stick used for hitting people cudgel verb [T] -ll- or US USUALLY -l- to hit someone with a cudgel Unit 10: Unit 10 duck (MOVE) verb 1 [I or T] to move your head or the top part of your body quickly down, especially to avoid being hit: I saw the ball hurtling towards me and ducked (down).