What is "dolchamar"

Dolchamar is a Finnish rock band that performs in the language Esperanto. The band was formed in 1999 in London by Patrik Austin after his departure from Punaiset Messiaat, and were instantly signed on for the French Vinilkosmo record company and the band resides in Finland. In 2003, they changed their name from Dolcxamar to Dolchamar, a change between the two conventions for representing the Esperanto word dolĉamar’, pronounced — poetic for dolĉamaro (literally "Sweet bitterness").