Final answer:
The word 'mendacious' means deceptive, describing someone who lies or deceives.
Step-by-step explanation:
The meaning of the word 'mendacious' is deceptive. This adjective describes someone who is not telling the truth, someone who is prone to lying or deceiving. It is the opposite of being honest or sincere. For example, a mendacious witness in a trial would be one that is providing false testimony.
When looking at the options provided, the correct answer is 2) Deceptive. Honest, sincere, and trustworthy are antonyms of mendacious, which is important to understand when evaluating vocabulary and determining the meanings of words.