Complex sentence: In the 17th century, the term was used in a pejorative sense due to the childish origins of the term as engaging in one's hobby equated to the horse outfit from the term's formulation and was considered a overindulgence that would yield no benefit.
Split into simpler sentences: In the 17th century, the term was used in a pejorative sense due to the childish origins of the term. Referring to the origin of the word; engaging in one's hobby equated to the horse outfit from the term's formulation and was considered a overindulgence that would yield no benefit.