The meaning of the word "up-keep" refers to the act of maintaining something, such as a house or property, in good condition. Some possible antonyms for this word include "neglect," "abandonment," "disrepair," or "dilapidation." Neglect implies a lack of attention or care, while abandonment suggests complete desertion or abandonment of the property. Disrepair indicates the property is in a state of decline, in need of repair, while dilapidation suggests the property is in ruin. Overall, these antonyms for "up-keep" suggest the opposite of proper maintenance and care, and highlight the consequences that can result from neglecting a property.