investment
astonishment
controversial
breakthrough
superb
implement
trivial
stimulate
revolution
upgrade
excellent or brilliant in a very noticeable way
a sudden, complete, or extreme change
to begin to do or use (something, such as a plan)
of little worth or importance
relating to or causing much discussion, disagreement, or argument
a sudden advance especially in knowledge or technique
a feeling of great surprise and wonder
the outlay of money usually for income or profit
to make something more active
to raise the quality of
