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strike on (something)
1. Literally, to hit, kick, or knock someone or something on some specific location. In this usage, a noun or pronoun is used between "strike" and "on." The child struck her dad on the head with the toy hammer.
2. To make a sudden or unexpected discovery. We've struck on a new way to treat cancer as a result of our research into immune system modification. It appears the film studio has struck on a winning formula with its recent blockbuster series.
3. To highlight, introduce, or raise some topic or issue. I think you've struck on an important point, Jim. The CEO struck on a number of key figures during his presentation to investors.
strike someone or something on something
to hit someone or something on a particular place or part. The ball struck me on my elbow, causing a great deal of pain. I struck the bear on the paw, and that only made it madder.
strike something (up)on something
to hit or bang something on something else. She struck her head upon the side of the bed. Mary struck her elbow on the doorjamb.
strike onor strike upon
To discover something suddenly or unexpectedly: In the course of their research, the scientists struck on an entirely new approach. The detective struck upon a clue.