The word erg derives from the Latin word,energia,while sentiments are derived from internal non-social and mental influences.

Erg

In psychology, often related to the concept of ergs as basic human drives or motivations.

Sentiments

Sentiments refer to complex emotional states that combine feelings, thoughts, and attitudes, often directed towards people, objects, or concepts.

Energia

A term that could refer to energy in various contexts, such as physical, psychological, or spiritual vigor, but is not a standard psychological key term.