"Does one in" is a commonly used phrase to describe a state of exhaustion or fatigue. The spelling of this phrase follows the pronunciation of the words, with "does" pronounced as /dʌz/ and "one" as /wʌn/. The use of the word "in" at the end of the phrase is likely a contraction of "tire one in", which means to tire or exhaust oneself. As with many English phrases, the spelling may seem unusual but is simply a reflection of how the words are pronounced.
The phrase "does one in" is an idiom that generally refers to actions, events, or situations that severely exhaust or mentally and emotionally drain someone. It commonly implies that someone is overwhelmed or defeated, both physically and mentally, by a particular circumstance or experience.
This phrase often suggests a sense of helplessness and powerlessness, as if one is unable to cope with the difficulties or challenges presented. It can be used to describe a variety of scenarios, such as encountering a particularly demanding or stressful task, experiencing a loss or failure, or enduring an extended period of hardship.
To say that something "does one in" could also convey a sense of being completely drained of energy or motivation due to a demanding or strenuous activity. It implies that one feels depleted to the point where they are unable to continue or function effectively.
In summary, "does one in" is an idiomatic expression that conveys extreme exhaustion and defeat. It suggests a state of being overwhelmed, emotionally drained, and potentially even physically weakened by a situation or circumstance.