What does cogged mean?
Cogged carries two distinct meanings rooted in the same old word 'cog'. In its most common modern sense, it describes a wheel or gear fitted with cogs — the projecting teeth that mesh with another wheel to transmit motion. A cogged wheel was central to machinery long before precision gearing existed, appearing in mills, clocks, and early engines. The word's second sense is far older and more colourful: as the past tense of the verb 'to cog', it meant to cheat, especially at dice, where a 'cogged' die had been weighted or altered to favour the thrower. That sense survives mainly in historical writing and tales of gambling sharp practice. Today you are most likely to meet 'cogged' in technical or descriptive contexts — a cogged belt, a cogged wheel — while its swindling meaning lingers as a curiosity of English vocabulary, reminding us that even honest-sounding machinery words can have shady pasts.
Fitted with cogs or teeth, especially of a wheel or gear designed to mesh with another.
"The engineer examined the cogged wheel for signs of wear."
Most often used attributively before nouns such as 'wheel', 'gear', or 'belt'.
Past tense of 'to cog': cheated at dice or other games by manipulating or weighting the implements used.
"They accused him of having cogged the dice during the match."
Largely historical; encountered in older texts and discussions of gambling fraud.
Before casinos, gamblers hid their tricks inside 'cogged' dice — secretly weighted so the teeth of chance were fixed against you.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cogged
Both senses derive from the noun 'cog', whose Middle English origins are uncertain but likely trace to Scandinavian or Low German sources, where related words denoted rounded objects or projections. The mechanical sense extended naturally from the tooth-like projections on wheels. The verb sense — to cog, meaning to trick or load dice — emerged in the 16th century among gamblers, possibly influenced by the notion of a die being 'toothed' or doctored, though scholars debate whether it shares the same root as the mechanical cog.
Related word forms
How cogged is actually used
The mechanical sense ('cogged wheel') remains current in engineering and historical writing. The gambling sense survives mostly in historical accounts and literature about dice cheats; it is rare in modern everyday speech. As an adjective, 'cogged' typically precedes or modifies nouns like 'wheel', 'gear', or 'dice'.
Easily confused with cogged
'Cog' is the noun for the tooth itself or a gear, while 'cogged' describes something fitted with those teeth or refers to the act of cheating with dice.
'Cogent' means clear and convincing in argument, whereas 'cogged' relates either to gear teeth or to cheating.