indiscreet
adjective uk/ˌɪn.dɪˈskriːt/ us/ˌɪn.dɪˈskriːt/
轻率的，不慎重的;言行失检的
saying or doing things that tell people things that should be secret or that embarrass people
In an indiscreet moment, the president let his genuine opinions be known. 总统一时不慎讲了他的真实看法。
They have been rather indiscreet about their affair. 他们对他俩私通一事并不避人耳目。
Compare: discreet