stiffly
adverb uk/ˈstɪf.li/ us/ˈstɪf.li/
(FIRM)
笔挺地；僵直地
straight and not bending
The soldiers stood stiffly to attention. 士兵们笔挺地立正站着。
(NOT RELAXED)
生硬地，拘谨地
in a way that is too formal
"I don't think that it's anything to do with you," he said stiffly. “我认为这和你一点儿关系都没有，”他生硬地说。
(SEVERE)
UK严厉地
severely
I wrote a stiffly worded letter of complaint to the council. 我给委员会写了一封措词强硬的投诉信。