Incazelo yesichazamazwi yegama elithi "mainspring" ithi:Isiphethu esivunguzayo esinikeza amandla esisusa ewashini noma ewashini.Induna noma ebaluleke kakhulu. ingxenye noma ingxenye yento ethile.Umthombo wamandla noma ugqozi lwento ethize.Igama elithi "mainspring" lingasetshenziswa kokubili ngokwezwi nezwi, ukubhekisela kungxenye yemishini enika iwashi amandla noma iwashi, futhi ngokomfanekiso, ukubhekisela kumandla okushayela abalulekile noma ugqozi oluyisisekelo lwento ethize.