Unscramble Iddrref

What is the meaning of word iddrref unscrambled?

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

Make more words by adding or removing letters

How many 6 letter words can you make from letters I D 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 I and unscrambling ddrref
2) Removing the letter D and unscrambling idrref
3) Removing the letter D and unscrambling idrref
4) Removing the letter R and unscrambling iddref
5) Removing the letter R and unscrambling iddref
6) Removing the letter E and unscrambling iddrrf
7) Removing the letter F and unscrambling iddrre

More anagrams containing the letters I D D R R E F
iddrrfe idedfrr rddirfe irfrdde