Unscramble Ridus

What is the meaning of word ridus unscrambled?

What 5 letter words can be made from letters R I D U S:

1. ursid - Definition of ursid

Make more words by adding or removing letters

How many 4 letter words can you make from letters R I D U S?

1. rids - Definition of rids

2. surd - Definition of surd

3. urds - Definition of urds

Which 4 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter R and unscrambling idus
2) Removing the letter I and unscrambling rdus
3) Removing the letter D and unscrambling rius
4) Removing the letter U and unscrambling rids
5) Removing the letter S and unscrambling ridu

More anagrams containing the letters R I D U S
risdu risud isdur ruids