co-
UK/ˈkəʊ-/US/ˈkoʊ-/
co- prefix: jointly: the root verb is done in coordination between multiple actors or entities. Also the initialism of class of.
Prefix
co-
- Jointly: the root verb is done in coordination between multiple actors or entities
- coadoption
- coadapt
- Along with: the root verb is done along with or in addition to others.
- coassemble
- coadhesion
- Mutually: the root is done in a way that is reciprocal and bidirectional.
- coadherence
- coattraction
- Simultaneously, done or able to do at the same time.
- cobirthing
- cosexual
- Spatially located or positioned together, co-located.
- cocirculate
- coarctate
- In conjunction: the root needs another entity to take effect, or there is a one-way interaction between them.
- coantioxidant
- codepletion
- Moving or oriented in the same direction; co-directional.
- coflowing
- cocurrent
- Gender-mixed; having men and women together for the root activity or location.
- co-corrections
- co-educate
- Having commonality, similarity with respect to the root.
- coaxial
- cobelligerent
- Coequal, equal in rank.
- coadministrator
- coassessor
- Indicating a family relationship that indicates a common rank made through three degrees of separation, the middle of which is by marriage.
- co-sister
- co-parent-in-law
- Equally, equal with respect to the root.
- codominant
- coextension
- During the same time period as the root.
- coseasonal
- coseismic
- The difference from some fixed quantity.
- coaltitude
- colatitude
- Dual, relating to the opposite category.
- cocategory
- colimit
- Having multiple targets or effects; the root affects or involves multiple subjects.
- coaccused
- coaccumulation
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- Secondary or auxiliary in rank or priority.
- copilot
- coabuser
- Referring to coenzymes.
- coglucosidase
- coprotease
- Referring to copolymers.
- codimer
- copolypeptide
- Deriving from multiple sources.
- copolymer
- cointercalation
Also used as
co- is also the initialism of class of.
co- meaning in Urdu and Persian
co- in Urdu
- together, mutually, jointly
- ہمـ ham-
co- in Persian
- together, mutually, jointly
- همـ ham-
Synonyms of co-
Origin of co-
Learned borrowing from Latin co-, from con-, from Proto-Italic *kom-, from *kom, from Proto-Indo-European *ḱóm, possibly from *ḱe.
Initialism of class of.
Words formed from co-
- coactor
- coaddressee
- coadministration
- coadministrator
- coally
- coambassador
- coanchor
- coarbitrator
- coarchitect
- coassessor
- coassignee
- coauditor
- co-aunt
- coauthor
- coauthorship
- cobishop
- cocaptain
- cocaptaincy
- co-CEO
- cochair
- cochairman
- cochairperson
- cochairwoman
- cochampion
- cochief
- co-commander
- cocommentator
- coconstruction
- coconsul
- cocounsel
- cocreator
- cocurator
- codesigner
- codeveloper
- codictatorship
- codirector
- codrawer
- coeditor
- coestate
- coexecutant
- coexecutor
- coexecutrix
- cofacilitator
- co-father
- cofavorite
- cofeoffee
- cofilmmaker
- cofounder
- cogovernor
- cohead
- coheir
- coheiress
- coherald
- coheritor
- coholder
- cohost
- co-host
- cohostess
- coinheritor
- coinmate
Questions about co-
- What does co- mean?
- Co- means jointly: the root verb is done in coordination between multiple actors or entities.
- What is co- in Urdu?
- Co- in Urdu is ہمـ (ham-). See Co- meaning in Urdu.
- What part of speech is co-?
- Co- is a prefix.
- How do you pronounce co-?
- Co- is pronounced /ˈkəʊ-/ (UK).
Words near co- in the dictionary
Source and license
Adapted from Wiktionary: co- (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-co-.wav.
Cite this entry: “co-.” Word.ws, https://word.ws/co-. Based on Wiktionary, CC BY-SA 4.0.
