unthinking
adjective formal mainly disapproving uk/ʌnˈθɪŋ.kɪŋ/ us/ʌnˈθɪŋ.kɪŋ/
考虑不周的;不动脑筋的;不慎重的
not based on serious thought or an examination of the information
What annoys me about these people is their unthinking hostility to anything foreign or unfamiliar. 让我生气的是，这些人对任何外来的或是不熟悉的东西都不加区分地怀有敌意。