obligatory
Definition
Required by a rule, law, or social custom; mandatory.
日本語 規則、法律、または社会的慣習によって求められる
Example
"Wearing a helmet on the construction site is obligatory for safety."
Required by a rule, law, or social custom; mandatory.
日本語 規則、法律、または社会的慣習によって求められる
"Wearing a helmet on the construction site is obligatory for safety."