The term 'more tumble down' refers to something that is becoming increasingly dilapidated or run-down. Antonyms for this phrase include 'well-maintained', 'sturdy', 'strong', 'solid', and 'unchanged'. When we talk about something that is well-maintained, we mean that it is in good condition and has been regularly cared for. Sturdy, strong, and solid all imply that the object in question is durable and able to withstand wear and tear. Unchanged means that the item has remained the same, preserving its original state without any noticeable deterioration. Focusing on these types of positive antonyms serves to underline the importance of taking care of our surroundings and keeping them in good condition for future generations to enjoy.