惨笑 meaning in English

wan smile; smile wanly

I've tried to sell my little lot several times already, said pidlum with a sickly smile .
我已经好几次想卖掉我那点股票了，迪德卢姆惨笑着说。
A pitiful white smile lit her face as she spoke
她说的时候，脸上露出一点儿可怜的惨笑。
I begged , and told him i was only huck ; but he laughed such a screechy laugh , and roared and cussed , and kept on chasing me up
我求告于他，对他说，我只是哈克啊。不过，他如此这般地惨笑了一下，又吼了起来，咒骂了起来，又使劲追我。