The word "agenise" is not a commonly used term and the exact spelling may be unclear. However, if we break it down phonetically using IPA transcription, we can understand how it might be spelled. The word is pronounced /ˈeɪdʒənaɪz/ with stress on the second syllable. This suggests that the spelling could be "aginize" or "aginise" depending on whether the speaker uses American or British English. Without further context, it is difficult to determine the exact spelling of this unusual word.