Avoid caffeine and alcohol before bed.
Meaning: Don't drink coffee, tea, or alcohol before going to sleep because they can interfere with your sleep.
Choice of Words: Avoid means to stay away from or prevent something from happening. Caffeine is a stimulant found in coffee, tea, and some other drinks. Alcohol is a type of drink that can make you feel relaxed. Before means earlier than or in advance of a particular time. Bed is a piece of furniture used for sleeping.
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Related Expressions