The vocabulary of English contains anywhere from three-quarters of a million to one million words - by far the largest in the history of humankind. Despite this impressive accomplishment, many words in English have to do double duty and convey more than one meaning. As a result, one word can function as the opposite of two very different words.
"Double Duty Words,"
Word Ways: Vol. 19
, Article 10.
Available at: http://digitalcommons.butler.edu/wordways/vol19/iss2/10