feebly
adv. 无力地；微弱地；柔弱地
例句
His left hand moved feebly at his side.
他的左手在身边无力地动了一下。
《柯林斯英汉双解大词典》
I said "Sorry," very feebly, feeling rather embarrassed.
我很微弱地说了句“对不起”，感到特别尴尬。
'But I've only just got here,' he bleated feebly.
“可我刚刚才到这里呢。”他小声抱怨说。
《牛津词典》
