A simple smile can make someone's day better.
Meaning: Even a small act of kindness, like smiling at someone, can make them feel happier and improve their day.
Choice of Words: Simple means easy to understand or do. Smile is an expression of happiness or amusement. Make means to cause something to happen or exist. Someone's means belonging to a particular person. Day means the period of time between sunrise and sunset. Better means more good or desirable.
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