hljóðrænn
hljóðrænn is an Icelandic adjective that translates to "acoustic" in English. It is used to describe sounds or phenomena that are produced by natural means, without the use of electronic amplification or modification. For example, a hljóðrænn gítar refers to an acoustic guitar, which produces sound through the vibration of its strings and the resonance of its body, rather than through electronic pickups and amplifiers.
The term can also be applied to music that is played without electric instruments. A hljóðrænn tónleikar
The etymology of the word is straightforward, combining "hljóð" (sound) with the adjectival suffix "-rænn" (related