I was so impressed by his honesty that I plan to compliment him at the meeting.

compliment 是动词，意思是"称赞、表扬"，指对某人或某事表达赞美或欣赏。这个词来自拉丁语，由 com-（表示"完全"）和 plere（表示"填充"）组成，原意是"完全满足"，引申为"表达满意或赞美"。