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on one's mind
01
with one's thoughts or concerns centered on a particular subject or issue
What is the origin of the idiom "on one's mind" and when to use it?
The idiom "on one's mind" originated from the concept of thoughts and concerns occupying a person's mental space or preoccupying their thoughts. It signifies the presence of a specific topic, worry, or issue that is prominent in an individual's thinking and attention. The phrase is used to emphasize the mental focus and significance of the subject matter, suggesting that it is actively occupying the person's thoughts and influencing their state of mind.
Example
My mother always used to say that a still tongue makes a wise head, as a reminder to think before I speak and to not reveal everything that's on my mind.
What's on your mind?
Having a pet is the last thing on my mind right now, I barely have time to take care of myself.
Right now work is the last thing on my mind.
The agonizing decision to end the relationship weighed heavily on his mind.
