Immerge is a rare word that means to immerse oneself or be submerged in something. If you are looking for synonyms to use instead of immerge, you could consider words like sink, submerge, dip, plunge, immerse, or dive. These words all convey the concept of being submerged or surrounded by something. Other possible synonyms for immerge could be to disappear, vanish, evaporate, or dissolve, as they can also describe something becoming submerged or hidden from sight. Choosing the right word ultimately depends on the context and tone of what you are trying to communicate.