The opposite of "in consummation" can be "incompletion" or "unfinished." These antonyms imply that something is not yet finished, lacking, or incomplete. They convey a sense of imperfection or inadequacy. Other antonyms include "beginning," "initiation," or "commencement," which suggest the start of a process. "Disconnection," "separation," or "division" can also act as antonyms, conveying the idea of stopping or ending a process. In summary, the antonyms for "in consummation" highlight the various stages and states of a process, ranging from the beginning to the end.