Pronunciation: [ɪn vˈe͡ɪn] (IPA) 
The phrase "in vain" means without success or a positive outcome. The spelling of this phrase is straightforward, with "in" being spelled /ɪn/ and "vain" being spelled /veɪn/. The first syllable is pronounced with a short "i" sound, while the second syllable has a long "a" sound. The two words are often used together to convey a sense of futility or worthlessness, as in the phrase "he tried in vain to fix the problem."
The term "in vain" can be defined as an expression used to indicate that one's efforts or actions have been unsuccessful, without achieving the desired result or outcome. It implies that despite someone's best attempts, they have been futile or fruitless. When something is done or pursued in vain, it suggests that it was done in a manner lacking success or effectiveness.
The phrase "in vain" usually conveys a sense of disappointment, frustration, or regret, emphasizing the inutility or pointlessness of an endeavor. It is often used to describe an individual's or a group's attempt to accomplish a specific goal that turns out to be unsuccessful despite their hard work, dedication, or hope. This can be seen in various contexts, such as failed attempts to solve a problem, achieve a certain position or recognition, win a competition, or even find love or happiness.
The phrase originated from the Latin phrase "in vanum," which means "to no purpose" or "to no avail." The concept of acting or working "in vain" has been ingrained in numerous cultures and is an integral part of human experiences and endeavors. People often use this phrase to express their disappointment or acknowledge the futility of their efforts or actions, reminding themselves or others that despite their best intentions or efforts, the desired outcome was not achieved.
To no purpose; ineffectually.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The phrase "in vain" originated from the Latin word "vanus", which means empty, vain, or futile. The English word "vain" has its roots in this Latin term. Over time, the phrase "in vain" evolved to signify an action or effort that is without result, unsuccessful, or fruitless.
