niggling
adj. 为琐事操心的；过于精细的；琐碎的
n. 过于琐碎的工作；无关紧要的事
v. 挑剔（niggle 的 ing 形式）
例句
Something was niggling her.
她有点烦心的事儿。
《牛津词典》
She had niggling doubts about their relationship.
她时常对他们的关系有一丝疑虑。
Both players have been suffering from niggling injuries.
两个选手都经受着持久的伤痛困扰。
《柯林斯英汉双解大词典》
