"naturalness" in the noun sense
1. naturalness
the quality of being natural or based on natural principles
"he accepted the naturalness of death"
"the spontaneous naturalness of his manner"
2. artlessness, innocence, ingenuousness, naturalness
the quality of innocent naivete
3. naturalness
the likeness of a representation to the thing represented
"engineers strove to increase the naturalness of recorded music"
Source: WordNet® (An amazing lexical database of English)
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