disinterested
/dɪsˈɪntrəstɪd; dɪs`ɪntrəstɪd/ adj
not influenced by personal feelings or interests; unbiased 无个人利害关系的; 公正无私的; 不偏不倚的
a disinterested act of kindness 没有私心杂念的好心的行为
My advice is quite disinterested. 我的建议是正直无偏的. =>Usage at interest2 用法见interest2.