Unscramble Impref

What is the meaning of word impref unscrambled?

What 6 letter words can be made from letters I M P R E F:

Make more words by adding or removing letters

How many 5 letter words can you make from letters I M P R E F?

1. Fermi - Definition of Fermi

2. prime - Definition of prime

Which 5 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling mpref
2) Removing the letter M and unscrambling ipref
3) Removing the letter P and unscrambling imref
4) Removing the letter R and unscrambling impef
5) Removing the letter E and unscrambling imprf
6) Removing the letter F and unscrambling impre

More anagrams containing the letters I M P R E F
imprfe imrefp premfi mrfiep