Concept:A dead metaphor is a figure of speech whose original metaphorical image has been lost through frequent, repeated use.
Explanation:Over time, certain metaphorical expressions are used so often that people stop noticing the comparison behind them.
Because of this constant repetition, the phrase no longer creates a fresh, vivid mental image in the listener's or reader's mind.
As a result, the metaphor becomes stale and fails to stir any imaginative response.
This loss of impact makes it effectively powerless in communication.
Therefore, a dead metaphor is best described as one that is overused and, consequently, ineffective.
Answer:A. overused and ineffective