Final answer:
The underlined word 'childhood' is best described as an abstract noun.
Step-by-step explanation:
The word that best describes the underlined word 'childhood' in the sentence is abstract noun. An abstract noun refers to a concept, quality, or state that cannot be seen or touched. Childhood is a concept, as it represents the period of time when a person is a child. It is not a tangible thing like a concrete noun, nor is it a specific person or place like a proper noun.
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