To 'convince' is to make someone feel certain that something is true.
Explanation
Test of English for International Communication (TOEIC)
restriction - (noun) a rule or law that limits or controls what people can do
To 'swallow' is to make food or drink go down your throat and towards your stomach.
observant - (adj.) good or quick at noticing things
compatible - (adj.) able to exist or be used together without causing problems
To 'recline' is to lie or lean back in a relaxed way.
To 'ratify' is to make a written agreement official by signing it.
To 'deny' is to say that something is not true, or that you do not believe something.
quaint - (adj.) unusual and attractive, especially in an old-fashioned way
To 'back off' is to move backwards, away from someone or something.