co-

See also: Appendix:Variations of "co"

§English

§Etymology

From the Latin prefix co-.

§Prefix

co-

1. together; mutually; jointly
2. partner or subordinate in an activity
3. to the same degree
4. (mathematics) of the opposite, of the counterpart

   cokernel; codimension; cosine; counion; cointersection

§Translations

together, mutually, jointly

• French: co- (fr)
• German: ko- (de), mit-
• Italian: co-

• Latin: co-
• Russian: со- (ru) (so-), ко- (ru) (ko-), взаимо- (ru) (vzaimo-)

§Usage notes

• Generally, the use of a hyphen (-) is used in British English (e.g. co-operate), which is omitted in American English (e.g. cooperate).

§Derived terms

Derived terms

• coaxis
• cocategory
• cofocus
• coidentity
• cointersection
• coinversion
• cogroup

• coline
• comatrix
• comorphism
• coplane
• copoint
• corank
• coring

• cosecant
• cosine
• cosemisimple
• cotangent
• counion
• counital
• cooperation

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§French

§Prefix

co-

1. co- (together; jointly)

§Derived terms

► French words prefixed with co-

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§Latin

§Prefix

co-

1. together, with

   cogere, Quirinus (co-viri-nus), cohaerere, coire, colligere

2. (intensifier)
   • orior ("I rise") → coorior ("I arise", "I spring forth")
   • emo ("I buy") → coemo ("I buy up")
   • rumpo ("I break", "I destroy") → corrumpo ("I pervert", "I contaminate")
   • horresco ("I dread") → cohorresco ("I shudder", "I shiver")
   • labor ("I slip", "I go wrong") → collabor ("I collapse", "I fall in ruin")

§Derived terms

► Latin words prefixed with co-

§Related terms

• com-
• con-

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§Manx

§Etymology

From Old Irish com-.

§Prefix

co-

1. co-

§Derived terms

► Manx words prefixed with co-

§Mutation

Manx mutation
Radical	Lenition	Eclipsis
co-	cho-	go-
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

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§Scottish Gaelic

§Alternative forms

• comh-

§Etymology

From Old Irish com-.

§Prefix

co-

1. Usually (but not always) designates mutuality or reciprocity.

§Derived terms

► Scottish Gaelic words prefixed with co-