套问 tàowèn
[find out by asking seemingly casual questions;tactfully sound sb.out] 不直接提问,用拐弯抹角的话来打听出自己想知道的东西
设计言语向人探问消息。 《红楼梦．第二一回》：「宝钗便在炕上坐了，慢慢的闲言中套问他年纪家乡等语，留神窥察其言语志量，深可敬爱。」
英语 to sound sb out, to find out by tactful indirect questioning