Unscramble Setisrid

What is the meaning of word setisrid unscrambled?

What 8 letter words can be made from letters S E T I S R I D:

Make more words by adding or removing letters

How many 7 letter words can you make from letters S E T I S R I D?

1. dirties - Definition of dirties

2. dissert - Definition of dissert

3. ditsier - Definition of ditsier

4. strides - Definition of strides

5. tidiers - Definition of tidiers

Which 7 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter S and unscrambling etisrid
2) Removing the letter E and unscrambling stisrid
3) Removing the letter T and unscrambling seisrid
4) Removing the letter I and unscrambling setsrid
5) Removing the letter S and unscrambling setirid
6) Removing the letter R and unscrambling setisid
7) Removing the letter I and unscrambling setisrd
8) Removing the letter D and unscrambling setisri

More anagrams containing the letters S E T I S R I D
setrdiis setrdisi iridsest itedrssi