[1] It is a special case of word formation called clipping.
Clipped compounds are common in various slang and jargon vocabularies.
[1] Laurie Bauer suggests the following ad hoc distinction for English: If the word has compound stress, it is a clipped compound; if it has single-word stress, it is a blend.
In particular, the suffix -k is commonly used, for example, in askorbinka (from askorbinovaya kislota (i.e., ascorbic acid)).
For instance, a word processor (ワードプロセッサ wādo purosessa) may be referred to as simply ワープロ wāpuro, sexual harassment (セクシャルハラスメント sekusharu harasumento) as セクハラ sekuhara, the program Clip Studio Paint (クリップスタジオペイント Kurippu Sutajio Peinto) as クリスタ Kurisuta, the video game series Monster Hunter (モンスターハンター Monsutā Hantā) as モンハン Monhan, the United Nations (国際連合 Kokusai Rengō) as 国連 Kokuren, and the Soviet Union (ソビエト連邦 Sobieto Renpō) as ソ連 Soren.