This is the 11275th most frequent German word.
slow
The German word for "slow" is **langsam**, meaning "not fast; taking time to move or act."
In this sentence, 'langsam' is an adverb describing the manner in which the snail moves.
Die Schnecke bewegt sich langsam.
The snail moves slowly.
Here, 'langsame' is an adjective describing the noun 'Musik', specifying its characteristic as being slow.
Die langsame Musik beruhigt die Seele.
The slow music soothes the soul.
In this usage, 'langsamer' is a comparative form of the adjective 'langsam', comparing the pace of his work to that of his colleague's.