Unscramble Irrtb

What is the meaning of word irrtb unscrambled?

What 5 letter words can be made from letters I R R T B:

Make more words by adding or removing letters

How many 4 letter words can you make from letters I R R T B?

1. birr - Definition of birr

2. brit - Definition of brit

Which 4 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling rrtb
2) Removing the letter R and unscrambling irtb
3) Removing the letter R and unscrambling irtb
4) Removing the letter T and unscrambling irrb
5) Removing the letter B and unscrambling irrt

More anagrams containing the letters I R R T B
irtbr irtrb birtr rrbti