Unscramble Idftref

What is the meaning of word idftref unscrambled?

What 7 letter words can be made from letters I D F T R E F:

Make more words by adding or removing letters

How many 6 letter words can you make from letters I D F T R E F?

1. differ - Definition of differ

2. riffed - Definition of riffed

3. rifted - Definition of rifted

4. tiffed - Definition of tiffed

Which 6 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling dftref
2) Removing the letter D and unscrambling iftref
3) Removing the letter F and unscrambling idtref
4) Removing the letter T and unscrambling idfref
5) Removing the letter R and unscrambling idftef
6) Removing the letter E and unscrambling idftrf
7) Removing the letter F and unscrambling idftre

More anagrams containing the letters I D F T R E F
idftrfe idrefft ifdfter ertifdf