Exclude certain letter associations from a GREP style

Question

Hello community, I would like some advice on how to use grep in a file I am designing. I must admit that I don't understand this language very well. I currently have a paragraph style applied to several texts, I would like some words to be in bold automatically thanks to the use of grep and a character style. I can do it so far, but it gets complicated for me when the example below comes up.

For example, one of the words I need to highlight is "prépa" but sometimes the word "préparation" is also affected by the grep. What is the syntax to exclude the application of the character style on the beginning of the word?

Thank you in advance for your possible answer

Peter

pierrem3657468 · Accepted Answer

Manty thanks @Scott Falkner ! This works very well even if the proposal of @pixxxelschubser  is a bit more complete!

Scott Falkner · Answer

Try this: (?i)prépa(?=\s|\(|\.)It begins by turning on case insensitivity, which is why it can apply the style to the first word. After that it uses positive look ahead to make sure it applies only if there is white space, a closing parenthesis, or a period following the word. On second thought, this might work better: (?i)prépa(?![\l\u])This uses negative look ahead to disqualify any matching expression followed by any letter.

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