Cudgel is from Old English 'cycgel' ('club, heavy stick'), of uncertain further origin; possibly related to a Germanic root for 'knob' or 'lump'. The immediate etymological form is Old English cycgel. In present use as noun and verb, it means "a short thick stick used as a weapon", keeping the historical formation close to the word's ordinary semantic work. Because the origin is uncertain, the safest account is descriptive: the attested senses can be explained, but the ultimate formation remains unresolved. The modern form is therefore best understood through the stated historical form and present sense, without adding an unsupported chain of cognates or intermediate stages.