The word "demissions" is spelled with two "s"s, not one. This may be confusing as the root word "demission" only has one "s". However, the double "s" spelling is used to indicate the plural form of "demission". The word is pronounced as /dɪˈmɪʃ.ənz/ with the stress on the second syllable. It means the act of resigning from a position, and is commonly used in the context of work or politics.