不加思索

see 不假思索[bu4 jia3 si1 suo3]

no; not so / (bound form) not; un-

without / not / un-

to add / plus / (used after an adverb such as 不, 大, 稍 etc, and before a disyllabic verb, to indicate that the action of the verb is applied to sth or sb previously mentioned) / to apply (restrictions etc) to (sb) / to give (support, consideration etc) to (sth) / Canada (abbr. for 加拿大[Jia1 na2 da4]) / surname Jia

to think / to consider

to think deeply / to ponder

surname Suo / abbr. for 索馬里|索马里[Suo3 ma3 li3], Somalia

to search / to demand / to ask / to exact / large rope / isolated