わごむ （輪ゴム）

If your creative, maybe you can guess this in second. but just in case, heres "rubber band" if you didnt know.

ためぐち （タメ口）

I heard this on a video clip of a tv show. Its like "casual talk" as in not polite reservered lingo. Seems a bit common to use in a negative sense.

やぶさか

This word litterly means something along the lines of "reluctant" but in the context: やぶさかではないです which takes on the (clearly polite) meaning of '[even though you guys dont think so] it's no problem for me.'

ぜつみょう （絶妙）

I learned this one from a fast food chain (lotteria plus) they have rebranded most of their hamburgers as "superb"(perfect etc) hamburgers. context: 絶妙ＢＬＴハンバーガー

へんかく (変革)

This was on a poster promoting action to protect the environment. It was promoting "revelutionary change" (upheavel/reform) and what not. Lets do it!