maltreat
Concise Oxford English Dictionary © 2008 Oxford University Press:
maltreat/malˈtriːt/
▶verb treat cruelly or with violence.
– derivatives
maltreater noun,
maltreatment noun.
maltreater noun,
maltreatment noun.
– origin C18: from Fr. maltraiter.
'maltreat' also found in these Oxford entries:

