different between sluggish vs loitering

English

slug +? -ish

sluggish (comparative sluggisher or more sluggish, superlative sluggishest or most sluggish)

Habitually idle and lazy; slothful; dull; inactive
Synonyms: see Thesaurus:lazy
- c. 1874, Henry Wadsworth Longfellow, Ovid in Exile
  And the sluggish land slumbers in utter neglect.
Slow; having little motion.
Synonyms: see Thesaurus:slow
Antonym: nimble
- 1913, Paul Laurence Dunbar, At Sunset Time
  We float upon a sluggish stream,
  We ride no rapids mad,
  While life is all a tempered dream
  And every joy half sad.
Having no power to move oneself or itself; inert.
- 1695, John Woodward, An Essay toward a Natural History of the Earth and Terrestrial Bodies
  Matter, being impotent, sluggish, and inactive, hath no power to stir or move itself.
Characteristic of a sluggard; dull; stupid; tame; simple.
Synonyms: see Thesaurus:stupid
Exhibiting economic decline, inactivity, slow or subnormal growth.

loitering

loitering (countable and uncountable, plural loiterings)

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