Endergonic means absorbing energy in the form of work. Its etymology stems from the suffix -ergonic, as derived from the Greek root ergon, meaning work, combined with the prefix end-, as derived from the Greek root en, meaning put into. Endergonic reactions aren't spontaneous. By thermodynamic standards, work, a form of energy,'s defined as moving from the surroundings (the external region) to the system (the internal region). Thus, an endergonic process, as contrasted with an exergonic process,… (More on Endergonic)