IPA: /ˈkɒpɪlɛft/
KK: /ˈkɑːpɪlɛft/
A type of license that allows software to be freely used, modified, and shared, as long as any changes are also shared under the same terms.
The software was released under a copyleft license, allowing anyone to use and modify it freely.
Copyleft is formed from "co-" (meaning together) and "left" (from the verb "to leave"). The term refers to a licensing method that allows derivative works to be made freely available, emphasizing the idea of sharing and leaving rights for others to use.
Think of 'together' ('co-') and the idea of 'leaving' rights for others to use — that's why copyleft means allowing others to share and build upon your work.