斗胆

shù wǒ dǒu dǎn shuō yī jù zhè shì nǐ yě yǒu cuò

恕我斗胆说一句，这事你也有错。

I make bold to say that you are also to blame for this.

dǒu dǎn jiàn yì

斗胆建议

venture to suggest

wǒ dǒu dǎn wèn yī xia nín zūn xìng dà míng xiān sheng

我斗胆问一下您尊姓大名，先生。

May I make bold to ask your name, Sir?