(TDD) Initialism of stop keying/stop key, indicating a desire to end the conversation.

(handbells) Abbreviation of shake.

(Canada) Initialism of senior kindergarten.

Abbreviation of Saskatchewan., a province of Canada / Initialism of South Korea., a country in Asia / Initialism of Sunkyong., a company from South Korea

(knitting) skip

Initialism of some kind soul (usually in a request for information etc.) / The SKS rifle.

Abbreviation of synklepton.

plural of SK

Possessing skill; skilled. / Requiring skill.

Capacity to do something well; technique, ability. Skills are usually acquired or learned, as opposed to abilities, which are often thought of as innate.