The word "more untended" implies neglect, and antonyms for it would describe a state of being maintained or cared for. Some antonyms for "more untended" could be words like tended, nurtured, managed, maintained, cared for or cultivated. These words, when used in contrast to "more untended", suggest a sense of responsibility and attentiveness towards something or someone. In a garden, an antonym for "more untended" would be a well-maintained or well-cared-for garden, where plants are nurtured and tended to. In a personal or professional relationship, an antonym for "more untended" would signify care and attention towards that relationship.