What is "takk..."

Takk... is the fourth studio album by the Icelandic post-rock band Sigur Rós, released in September 2005 on EMI. The album debuted at number 27 on the US Billboard 200, selling 30,000 copies in its first week. In 2006, Takk... was certified gold by the BPI, marking 100,000 copies sold in the UK. In total, it has sold over 800,000 copies worldwide. "Takk" means "thanks" in Icelandic.