Check under rocks.
Meaning: This means to search or look for something that is located beneath rocks. It's like saying, Inspect the area that is located beneath rocks.
Choice of Words: Check is a verb that means to inspect or examine something. Under is a preposition that means below or beneath something. Rocks is a plural noun that refers to large pieces of stone. In this context, the sentence is asking someone to search for something that is located under rocks.
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Related Expressions