Antonyms for the word "rough-house" include delicate, gentle, refined, smooth, and polite. These words suggest the opposite of the boisterous and tumultuous behavior that is associated with roughhousing. Delicate refers to something that is fragile and requires care and sensitivity, while gentle implies a soft and soothing touch. Refined suggests a high level of culture and sophistication, while smooth relates to something that is even and free of roughness. Finally, polite refers to behavior that is courteous, respectful, and considerate of others. By using these antonyms, we can describe behavior that is calm, gentle, and respectful, rather than aggressive and disruptive.