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Make the gestures culture-neutral, or describe the intent of the hand gesture. For example: He gestured across his neck with a cutting motion. This generally implies decapitation, meaning any...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/39181 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Make the gestures culture-neutral, or describe the intent of the hand gesture. For example: > He gestured across his neck with a cutting motion. This generally implies decapitation, meaning anything from 'you're dead' to 'call off the action', but either way, given a context, the communication is clear regardless of culture. Loss of one's head is sort of a universal concern for humanity.