[求助]幾個詞彙的用法

huimie

現在在用胡敏的《胡敏讀故事記單詞》，其中有些用法總覺得不是太對勁，所以想請教各位：

１.Despite their lack of success,...　　　lack可以這么用嗎？their lack of success＝fail？

2, She had some abrasions to her wrists where the abrasive rope had scraped her.　　這句話總體覺得奇怪，特別是“the abrasive rope had scraped her”

3, ...who often abstained from attending the boring lectures, I dared not absolve myself from this responsibility.　　我用的朗文高階上說abstain一般用於sex & alcohol，不過也可能是因為版本有些老了。

4. I even pledged abstinence from my abundant supply of alcohol.　pledge的用法。。。

5. ... a colorful silk scarf that accentuated her lovely smile.　　accentuate可以用在這個場合嗎