“畏首畏尾的人”可以翻译为“a person who is overcautious and hesitant” 或者更简洁地表达为 “a timid/fearful person” 或 “a person with a timid/fearful attitude”(根据具体语境,“timid”侧重于胆小的、羞怯的;“fearful”侧重于充满恐惧的,二者可互换使用 )。
例如:
He is such an overcautious and hesitant person that he misses many good opportunities.(他是个畏首畏尾的人,错过了很多好机会 。)
Don't be a timid person; take the initiative and grasp the chance.(别做畏首畏尾的人,要主动出击,抓住机会 。)