Unscramble Didrref

What is the meaning of word didrref unscrambled?

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

Make more words by adding or removing letters

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

1. ridder - Definition of ridder

Which 6 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter D and unscrambling idrref
2) Removing the letter I and unscrambling ddrref
3) Removing the letter D and unscrambling dirref
4) Removing the letter R and unscrambling didref
5) Removing the letter R and unscrambling didref
6) Removing the letter E and unscrambling didrrf
7) Removing the letter F and unscrambling didrre

More anagrams containing the letters D I D R R E F
didrrfe diedfrr dridfer idrrdef