Happiness is contagious, share it.
Meaning: This sentence is encouraging people to share happiness because it can be easily spread to others.
Choice of Words: Happiness is a noun that refers to a state of well-being and contentment. Contagious is an adjective that describes something that can be easily spread or transmitted. Share is a verb that means to divide something among several people or to make something known to others. It is a pronoun that refers to a previously mentioned thing or concept. When you put them together, "Happiness is contagious, share it" is a sentence that encourages sharing happiness because it can be easily spread to others.
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