This is the 13885th most frequent Swedish word.
ålsta
"Ålsta" is not a standard Swedish word; it may be a proper noun, such as a place name.
In this sentence, 'åls-ta' refers to a proper noun, possibly a geographical name like Ålstasjön.
Jag bor nära Ålstasjön.
I live near Ålstasjön.
Here, 'åls-ta' is part of a compound proper noun, indicating a forest area named Ålstaskogen.
Älgar passerade genom Ålstaskogen i morse.
Mooses passed through Ålstaskogen this morning.
In this usage, 'åls-ta' appears within a proper noun referring to a farm or estate named Ålstaholms gård.