fast

be, seem

The internet connection at my office is always too fast for the old equipment to handle.

exceptionally, extremely, really, remarkably, surprisingly, very

She was remarkably fast at solving the puzzle and finished before anyone else.

a bit, fairly, a little, pretty, quite, reasonably, relatively

The internet connection at my new apartment is reasonably fast for streaming videos.

amazingly, blindingly, incredibly, unbelievably

The internet connection was incredibly fast during the download.

be, seem

The internet connection is fast enough to stream movies without buffering.

exceptionally, extremely, really, remarkably, surprisingly, very

The new computer processes data extremely fast, which saves us hours every week.

a bit, fairly, a little, pretty, quite, reasonably, relatively

The internet connection at my new apartment is reasonably fast for streaming videos.

amazingly, blindingly, incredibly, unbelievably

She was driving incredibly fast down the highway when the police officer stopped her.

go on, keep, observe

During Ramadan, many Muslims observe fast from sunrise to sunset each day.

break

After sleeping for twelve hours, she woke up hungry and broke her fast with a big breakfast.