Unscramble Itrsets

What is the meaning of word itrsets unscrambled?

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

1. sitters - Definition of sitters

Make more words by adding or removing letters

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

1. resist - Definition of resist

2. resits - Definition of resits

3. sister - Definition of sister

4. Sitter - Definition of Sitter

5. testis - Definition of testis

6. tetris - Definition of tetris

7. titers - Definition of titers

8. titres - Definition of titres

9. triste - Definition of triste

Which 6 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling trsets
2) Removing the letter T and unscrambling irsets
3) Removing the letter R and unscrambling itsets
4) Removing the letter S and unscrambling itrets
5) Removing the letter E and unscrambling itrsts
6) Removing the letter T and unscrambling itrses
7) Removing the letter S and unscrambling itrset

More anagrams containing the letters I T R S E T S
itrsset itrsste sittsre rssteit