jembellissais
The word "jembellissais" is a French verb form. Specifically, it is the first-person singular imperfect indicative of the verb "jembellir." The verb "jembellir" itself is not a standard French word. It appears to be a neologism or a misspelling of a similar-sounding word.
If we assume "jembellir" is derived from "embellir," which means "to embellish," "to beautify," or "to adorn,"
Therefore, in a hypothetical context where "jembellir" was a recognized verb with the meaning of "to embellish,"