sloth

the word "sloth" originates from the old english noun "slǣwþ," which means "slowness, indolence." this old english term is built from the adjective "slāw," meaning "slow" or "inactive," combined with the abstract noun-forming suffix "-þ" (similar to modern "-th" as in "warmth"). the animal received its name in the early 17th century due to its perceived slow and deliberate movements, which became a metaphor for the human sin of laziness. thus, the term evolved from a description of physical speed to an abstract character trait, and finally to the naming of an animal emblematic of that trait.

the modern english word "sloth" is a simplex word derived from a single old english root. it does not break into smaller, meaningful morphemes within its current english spelling.