different between indifference vs sluggishness

English

From Middle French indifférence, from Late Latin indifferentia

indifference (countable and uncountable, plural indifferences)

The state of being indifferent.
Unbiased impartiality.
Unemotional apathy.
His daughter's indifference towards the sexist group made him wonder if she was even human.
A lack of enthusiasm.
Unconcerned nonchalance.

sluggish +? -ness

sluggishness (usually uncountable, plural sluggishnesses)

The property of being sluggish, unable or unwilling to act quickly.
The state of economic decline, inactivity, slow or subnormal growth.
- 2012, Javier Solana, Project Syndicate, Whose Sovereignty?:
  And we see such interdependence even more clearly in their economic performance: China’s annual GDP growth rate, for example, will slow by two percentage points this year, owing to sluggishness in the United States and the EU.

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