The mirror has drowned a young girl means that in the mirror, the image of young girl has disappeared.

The mirror used to reflect the image of a young lady but as time passed, her face gradually started aging.Her young face grew old. The lady lost her charm, beauty, innocence and youth.And thus, her young face was replaced by an old one. She,now, looks like a terrible fish.

Introduction:
In the story "The Mirror" by Haruki Murakami, the mirror plays a significant role in the transformation of a young girl into an old woman. The mirror acts as a portal between two parallel worlds, where the old woman in the mirror lures the young girl into her world and takes her place.

The Drowning of the Young Girl:
- The mirror initially reflects the image of a young girl who is curious and drawn to the mirror.
- The young girl becomes obsessed with the mirror and spends hours staring at her reflection.
- The mirror slowly begins to manipulate the young girl, drawing her into its world and drowning her in its depths.

Replacement with an Old Woman:
- As the young girl becomes more entangled with the mirror, her reflection starts to change into that of an old woman.
- The old woman in the mirror begins to take over the young girl's identity, gradually replacing her in the real world.
- The young girl's physical appearance starts to age rapidly, reflecting the transformation happening within her.

The Psychological Impact:
- The young girl's mind is consumed by the mirror, causing her to lose touch with reality and her true self.
- The old woman's presence in the mirror distorts the young girl's perception of herself, leading to a complete takeover of her identity.

The Moral Lesson:
- The story serves as a cautionary tale about the dangers of vanity and obsession with outward appearances.
- It highlights the destructive nature of an unchecked desire for beauty and youth, ultimately leading to the loss of one's true self.

In conclusion, the mirror in "The Mirror" symbolizes the transformative power of self-perception and the consequences of losing oneself in the pursuit of an idealized image.