How to use “absorbed in” (not “absorbed at”)

❌ Don’t say this: The child was absorbed (very much interested) at his drawing.

✅ Say this: The child was absorbed in his drawing.

Why “at” is wrong and “in” is correct

The word absorbed means “very much interested” — like a sponge that takes liquid fully inside itself. In English, this idea of going inside requires the preposition in (for example: in water, in a book, in thought). The preposition at is wrong here because at only shows a location or direction (at the door, at the wall, look at), not immersion. You cannot be “inside” something with at — you need in.