D110-201708024-reading-272

1. Proficient= able to do something well or skillfully

proficient in/ at

E.g. Martha’s proficient in Swedish.

E.g. There’s only one way to become proficient at anything – practice!

E.g. To do a multimedia presentation you need to be proficient in public speaking.

—proficiently adv

2. exponential= increasing or growing very fast

e.g. exponential growth

e.g. exponentially

3. exacerbate= to make a problem worse

4. unprecedented= never having happened or existed before

e.g. The government took the unprecedented step of releasing confidential correspondence.