Frequency - Word Form
  1 unacceptable
  1 unaware
  1 undampened
  1 undecided
  1 under
  3 understand
  2 understanding
  2 understood
  1 unexpectedly
  2 unfair
  1 unfinished
  2 unhappy
  1 uninvited
  1 unknown
  1 unnecessary
  2 until
 15 up
  1 upset
  1 us
  1 used
  4 usual
  1 usually