The boy lost his ball in the tall grass.
Meaning: The boy threw his ball, but it landed in a part of the grass that was very tall. Now he can't see it and doesn't know where it is.
Choice of Words: Lost means to no longer have something because you can't find it. In is a preposition indicating a location or position within something. When you put them together, "Lost in" means that the ball is somewhere in the tall grass, and the boy can't find it.
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Related Expressions