In many countries, wearing a seatbelt is obligatory for all passengers, a regulation enforced to reduce traffic fatalities.
在许多国家，所有乘客系安全带是强制性的，这一规定旨在减少交通事故死亡人数。
Which choice best defines “obligatory”?
C — Required by a rule or law. “obligatory” means required by a rule or law.
Which word means “required by a rule or law”?
B — obligatory. “obligatory” means required by a rule or law.
obligatory — required by a rule or law. In Chinese: 强制性的.
obligatory is pronounced /əˈblɪɡətɔːri/.
In many countries, wearing a seatbelt is obligatory for all passengers, a regulation enforced to reduce traffic fatalities. (在许多国家，所有乘客系安全带是强制性的，这一规定旨在减少交通事故死亡人数。)
mandatory, compulsory, required — all close in meaning to obligatory (required by a rule or law).
optional, voluntary — each the opposite of obligatory (required by a rule or law).
Yes. obligatory is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.