This is the 4898th most frequent Swedish word.
bjärsmyr
"Enigmatically, 'Bjärsmyr' doesn't appear in standard Swedish lexicons or common usage."
Here, 'bjärsmyren' is used in a definitive context (definite form) to emphasize its specific location within the narrative.
Fåglarna vid bjärsmyren sjöng vackert under solnedgången.
The birds at the bjärsmyr sang beautifully during sunset.
Here, 'bjärsmyr' is used as a proper noun, referring to a specific named geographical location.
Bjärsmyr är en naturskön myr som ligger nära Göteborg.
Bjärsmyr is a scenic mire located near Gothenburg.
In this sentence, 'bjärsmyr' is used as a common noun referring to a type of landscape (mire), not a proper name.