The opposite of over-hauling can be expressed through words like neglecting, disregarding, ignoring, or abandoning. When something has not been overhauled, it may not have received the necessary repairs or maintenance, resulting in its neglect. Disregarding an item or system can also mean that it has not been given proper attention in terms of upgrading or maintenance. Ignoring may also mean that it has been left untouched for an extended period, leading to the need for a full repair or replacement. Abandoning, on the other hand, indicates that the item has been completely left without any attention, possibly leading to irreparable damage.