Puzzle: What In The World Happened Here? CLXXXVIII (188):

Vanna made up a word for the third pic: anageoistic, and thought "u" would be helpful as it is the most frequent vowel in the answer, even if many folks think there should be 1 more "u".

☐☐☐☐☐☐ ☐☐u☐☐☐ ☐u☐☐☐☐☐ ☐☐ ☐☐u☐ ☐☐☐☐☐☐☐

Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII