1. 大胆：audaciously /大胆地/**地/ | audaciousness /大胆/**/ | audacity /大胆/厚脸/**/厚脸皮/旁若无人/无礼/
audaciousness
noun
1. aggressive boldness or unmitigated effrontery
e.g. he had the audacity to question my decision
Synonym: audacity
2. fearless daring
Synonym: audacity temerity