The word two is derived from the old english words twā (feminine), tū (neuter), and twēġen (masculine, which survives today in the form twain). Put two and two together, to reach the correct and obvious conclusion. The meaning of two is being one more than one in number
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How to use two in a sentence.
Idioms of two minds (about something) someone's two cents two sides of the same coin (definition of two from the cambridge academic content dictionary © cambridge university press)
Find 273 synonyms for two to improve your writing and expand your vocabulary. In two, into two separate parts, as halves