The antonyms for the number "one hundred forty-five" would be any number less than 145. Some examples include ninety-nine, seventy-three, and twenty-two. The opposite of a specific number can vary depending on the context, as it could imply smaller, larger, or completely different values. In terms of direction or orientation, some antonyms could be up, down, left or right. When it comes to words that are opposite in meaning, examples that could be used with "one hundred forty-five" would be words like few, small, and diminutive. Ultimately, antonyms are words that convey the opposite meaning, and the antonyms for "one hundred forty-five" can vary depending on the situation.