c 幾分, やや, 多少 (somewhat), 少々 (slightly); 目立つほど, かなり (quite).

・rather dark 少々暗い.

・rather good-looking かなり器量のよい.

・I feel rather better [more comfortable] today. 今日は幾分気分がよい.

・rather interesting(ly) かなり興味深い[興味深く].

・He died after a rather short illness. ちょっとの間病んで死んだ.

・This book is rather too difficult for you [more difficult than I thought]. この本は君には少々難しすぎる[思ったより難しい].

・It's (really) rather a pity [shame]. (本当に)かなり残念なことだ.

・She's accomplished rather a lot [a good deal]. 彼女はかなり多くを成し遂げた.