1. 机智的：37.successful成功的 | 38.tactful机智的 | 39.trustworthy可信赖的

2. 机敏的(圆滑的)：sensitive 敏感的 | mature成熟的 | tactful机敏的圆滑的

3. 真圆滑：...the last bitch on earth.|我也不会对你摇尾巴 | ...tactful?|...真圆滑? | Sparrow, I repeat.|斯派洛,我重覆一次

1. 有分寸的;考虑周全的;圆通的
If you describe a person or what they say as tactful you approve of them because they are careful not to offend or upset another person.

e.g. He had been extremely tactful in dealing with the financial question...
他在处理这个财务问题时很有分寸。
e.g. I decided it wouldn't be tactful to order another beer.
我想了想，觉得再要啤酒就有点过分了。

adj

1. showing skill and sensitivity in dealing with people

e.g. by diplomatic conduct he avoided antagonizing anyone
a tactful way of correcting someone
the agency got the kid-glove treatment on Capitol Hill

Synonym: kid-glove

2. having or showing a sense of what is fitting and considerate in dealing with others

e.g. she was tactful enough not to shatter his illusion
a tactful remark eased her embarrassment