obligatory
adjective
[ əˈblɪɡət(ə)ri ]
• required by a legal, moral, or other rule; compulsory.
• "use of seat belts in cars is now obligatory"
Similar:
compulsory,
mandatory,
prescribed,
required,
demanded,
statutory,
enforced,
binding,
incumbent,
requisite,
necessary,
imperative,
unavoidable,
inescapable,
essential,
Origin:
late Middle English: from late Latin obligatorius, from Latin obligat- ‘obliged’, from the verb obligare (see oblige).
