onus
onus
noun
/ˈəʊnəs/
(usually the onus)
singular (formal)
​the responsibility for something
The onus is on employers to follow health and safety laws.
The onus of proof lies with the prosecution.
The report puts the onus of children’s early education firmly on the parents.
Word Origin
mid 17th cent.: from Latin, literally ‘load or burden’.