What is the meaning of Propositional_variable?

5-letter words containing

• 5-letter words containing n

• 5-letter words containing e

• 5-letter words containing l

• 5-letter words containing a

• 5-letter words containing d

5-letter words starting with

• 5-letter words starting with u

• 5-letter words starting with a

• 5-letter words starting with e

• 5-letter words starting with p

• 5-letter words starting with o

5-letter words in the middle

• 5-letter words in the middle n

• 5-letter words in the middle r

• 5-letter words in the middle n

• 5-letter words in the middle i

• 5-letter words in the middle a

5-letter words ending with

• 5-letter words ending with m

• 5-letter words ending with l

• 5-letter words ending with s

• 5-letter words ending with h

• 5-letter words ending with i

5-letter words excluding

• 5-letter words excluding a

• 5-letter words excluding a

• 5-letter words excluding o

• 5-letter words excluding d

• 5-letter words excluding i