It is not a word; it is the compound of se + en (and the "e" of "se" is élidé, i.e. suppressed, to be replaced by an apostrophe).I just wanted a definition for this word ["s'en" ]
Fox123, if a question like yours lacks at least a sample sentence, our members will find it difficult to provide accurate answers. As Jean said: there is no boum-boum translation.Quote the words which need translating and, if possible, give your attempt. What is your question about? Is it a problem of agreement, of conjugation…? Please be specific in your post; explain your doubts.
Is there any context? Please realize that context is critical in linguistics. You must, therefore, provide the complete sentence. If it’s possible to give the source, please do so.
The preceding and following sentences can often help us to understand the problem. Once again, please give these if possible.