Imaginer is a French verb that translates to "to imagine" in English. This word can be used in various contexts such as dreaming, visualizing, or creating mental images. If you need to express the same sentiment but with different words, you could use synonyms such as "conceive," "envision," "fantasize," "picture," "contemplate," or "visualize." Other options include "fancy," "brainstorm," "daydream," "think up," "innovate," "meditate," or "muse." Each of these words portrays the act of using one's imagination to produce an idea, a story, or even a world in the mind's eye.