neglectfully
/nɪɡ'lektfəlɪ/in a neglectful manner,in a way that does not give enough care and attention to something or someone.
adverb [方式副词] 怠慢地；不注意地
The couple were accused of behaving neglectfully toward their four young children. 这对夫妇被指控对四个年幼的孩子疏忽大意。
