Presignifying is a complex term that means to foreshadow or indicate something beforehand. As this is quite a specific term, there are a limited number of synonyms available to use in its place. Some alternatives to presignifying include "prefiguring," "pre-empting," and "anticipating." These terms all imply the sense of indicating or predicting something before it occurs, and can be used in similar contexts to presignifying. Other possible synonyms include "foretelling" and "predicting," although these may suggest a more explicit and definite sense of future events. Ultimately, the choice of synonym will depend on the specific context and intended meaning of the original term.