The correct spelling of the phrase "hadst ones number" is "had'st one's number." The apostrophe stands for the missing letter "e" in "hadst," which is the archaic form of "had." The "st" at the end of "hadst" indicates it is the second person singular past tense form of "have." The "o" and "n" in "one's" are pronounced with the "uh" sound, represented by the schwa symbol /ə/. The word "number" is pronounced with the schwa sound in the second syllable, represented by /ʌ/.
"Hadst one's number" is an idiomatic expression derived from the verb "to have" and the noun "number." It is used to describe a situation where someone fully understands or comprehends another person's character, intentions, or capabilities, often in a negative sense.
In this context, the term "number" refers metaphorically to an individual's personality or attitude, intimately known or familiar to the one who "has" it. It suggests that the observer possesses a complete understanding of the other person's intentions or motives, enabling accurate predictions or a deep understanding of their behavior or actions.
The idiom often implies an element of manipulation or a keen ability to anticipate the other person's behavior, enabling the user to take advantage or exploit the situation. It can also imply a certain level of intimacy or closeness with the person in question.
For example, if someone claims to "have someone's number," it means they have an astute perception of the other person's true character, enabling them to see through superficial facades or deceptive behavior. This expression is often used in conversations or situations involving individuals who have a history or an understanding of each other's motives or actions.
Overall, "hadst one's number" signifies a deep knowledge or insight into another person's true intentions or character, allowing the user to have an advantageous position in the interaction or relationship.