Altruistic /ˌæl.truˈɪs.tɪk/ adj. 利他的,无私心的
meaning: showing a wish to help or bring advantages to others, even if it results in disadvantage for yourself.
1) 词根:altru- 其他(alter)
2) 后缀:-ist 名词后缀;-ic 形容词后缀
e.g. I doubt whether her motives for donating the money are altruistic—she’s probably looking for publicity. 我怀疑她捐钱的动机是否出于无私——很可能是沽名钓誉罢了。