In this video I use basic regular expressions (via grep) to search for words in the Mac dictionary file.
This is the hangman game I used in the video: https://hangmanwordgame.com/
Count Words in the Dictionary File
wc -l /usr/share/dict/words
Search for Incomplete Word (_AL_ATION) in the Dictionary
grep -i '^.al.ation$' /usr/share/dict/words
Exclude Letter (e) from Search
grep -i '^.al.ation$' /usr/share/dict/words|grep -vi 'e'
Count the Number of Matches in a Search
grep -i '^.al.ation$' /usr/share/dict/words|grep -vi 'e' | wc -l