The term 'used up' can be defined as having been completely CONSUMED, exhausted, or SPENT. This can be represented by a variety of words, such as DEAD (4 letters), BANKRUPT (8 letters), ATE (3 letters), DONE (4 letters), GONE (4 letters), blown (5 letters), EATEN (5 letters), SPENT (5 letters), UNDONE (6 letters), WASTED (6 letters), allgone (7 letters), DRAINED (7 letters), CONSUMED (8 letters), DEPLETED (8 letters), DEVOURED (8 letters), and SQUANDERED (10 letters). All of these words indicate that something has been used up, either through being CONSUMED, exhausted, or SPENT.