This is the 10976th most frequent Swedish word.
lättaste
"Lättaste" means "easiest" in English.
Here, 'lättaste' is used as a superlative adjective describing the attribute of 'vägen' ('the way') in terms of ease.
Det här är den lättaste vägen till toppen.
This is the easiest way to the top.
In this sentence, 'lättaste' acts as a superlative adjective qualifying 'lösningen' ('the solution'), considering it relative to other solutions in terms of ease.
Den lättaste lösningen är inte alltid den bästa.
The easiest solution is not always the best.
Here, 'lättaste' functions as a superlative to describe 'uppgiften' ('the task'), characterizing it in comparison with other tasks regarding simplicity.