犬を散歩させる

The word '犬' (inu) meaning 'dog' has ancient origins in Japanese, dating back to the Old Japanese period. Its etymology is somewhat debated, but it's believed to have roots in a word meaning 'barking animal.' The particle 'を' (o) is a direct object marker. '散歩' (sanpo) meaning 'walk' or 'stroll' is a compound word derived from Middle Chinese. '散' (san) means 'to scatter' or 'to disperse,' and '歩' (po) means 'to walk.' Over time, these characters combined to form the concept of a leisurely walk. The causative verb 'させる' (saseru) is formed from the verb 'する' (suru) meaning 'to do' and the causative suffix 'せる' (seru). Therefore, '散歩させる' literally means 'to cause to walk' or 'to make walk.' When combined, '犬を散歩させる' means 'to cause a dog to walk' or more naturally, 'to take a dog out for a walk.' The construction reflects the agent (the person) causing the action (the dog walking).