Unscramble Ifsets

What is the meaning of word ifsets unscrambled?

What 6 letter words can be made from letters I F S E T S:

1. feists - Definition of feists

Make more words by adding or removing letters

How many 5 letter words can you make from letters I F S E T S?

1. feist - Definition of feist

2. fests - Definition of fests

3. fists - Definition of fists

4. seifs - Definition of seifs

5. sifts - Definition of sifts

6. sites - Definition of sites

7. sties - Definition of sties

Which 5 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling fsets
2) Removing the letter F and unscrambling isets
3) Removing the letter S and unscrambling ifets
4) Removing the letter E and unscrambling ifsts
5) Removing the letter T and unscrambling ifses
6) Removing the letter S and unscrambling ifset

More anagrams containing the letters I F S E T S
ifsset ifsste tifess steisf