Unscramble Ostfix

What is the meaning of word ostfix unscrambled?

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

Make more words by adding or removing letters

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

1. foist - Definition of foist

Which 5 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter O and unscrambling stfix
2) Removing the letter S and unscrambling otfix
3) Removing the letter T and unscrambling osfix
4) Removing the letter F and unscrambling ostix
5) Removing the letter I and unscrambling ostfx
6) Removing the letter X and unscrambling ostfi

More anagrams containing the letters O S T F I X
ostfxi ostifx ixtfos stxfio