Definition of misusage in English:

misusage

Pronunciation /misˈyo͞osij/ /mɪsˈjusɪdʒ/

noun

archaic
  • Unjust treatment.

    ‘they were determined to defend themselves from misusage’
    • ‘Soon he fell ill with misusage and grievance, and one day that one dreadful, horrible day, his light was doused.’
    mistake, error, blunder, slip, lapse, solecism, misusage, impropriety