What is the meaning of Nixus?

rested upon, leaned on, having rested upon

pressed forward, advanced, having advanced

mounted, climbed, ascended, having been mounted

strained in giving birth, having strained in giving birth

struggled, endeavoured, having struggled

contended in argument, argued, having argued

rested, relied, depended upon, having depended upon

alternative form of nīsus (pressure, strain)

Source: wiktionary.org