regional.ar.che
Che: the quintessential Argentine address word
Che is the all-purpose vocative — 'hey / mate' — used to hail someone or pepper speech: che, ¿vamos? So iconic that Ernesto Guevara was nicknamed 'el Che' for overusing it.
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Explanation
Che is used to hail someone, open a sentence, or fill a pause — the Argentine (and Uruguayan/Paraguayan) equivalent of 'hey' or 'mate'. It is affectionate and informal, and pairs constantly with vos: che, ¿vos venís?
Among close friends it teams up with boludo/a — literally an insult, but here a warm 'dude': che boludo, ¡tanto tiempo! Tone is everything: the same word is an insult to a stranger and a greeting to a friend.
The origin is debated (proposed sources include Guaraní, Mapuche, and Valencian che), but its identity is settled: it is the single most recognizable marker of Argentine speech — which is why Guevara, a foreigner who said it constantly, became 'el Che'.
Examples
Hey, can you pass me the mate?
Region: AR
How's it going, mate? Long time no see!
Region: AR
Dude, I can't believe it.
Region: AR