What is the meaning of Play_both_sides_against_the_middle?

5-letter words containing

• 5-letter words containing f

• 5-letter words containing i

• 5-letter words containing y

• 5-letter words containing k

• 5-letter words containing e

5-letter words starting with

• 5-letter words starting with e

• 5-letter words starting with n

• 5-letter words starting with a

• 5-letter words starting with i

• 5-letter words starting with v

5-letter words in the middle

• 5-letter words in the middle r

• 5-letter words in the middle t

• 5-letter words in the middle o

• 5-letter words in the middle t

• 5-letter words in the middle e

5-letter words ending with

• 5-letter words ending with d

• 5-letter words ending with e

• 5-letter words ending with e

• 5-letter words ending with r

• 5-letter words ending with i

5-letter words excluding

• 5-letter words excluding e

• 5-letter words excluding e

• 5-letter words excluding g

• 5-letter words excluding e

• 5-letter words excluding e