Memories strengthen overnight.
Meaning: This means that memories can become stronger and more solidified during sleep.
Choice of Words: Memories is a plural noun that refers to the mental images and recollections of past experiences. Strengthen is a verb that means to make something stronger or more effective. Overnight is an adverb that means during the night or by the next morning. In this context, "memories strengthen overnight" means that the brain can consolidate and reinforce memories while you are sleeping, making them easier to recall later.
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