A History of Short Words

From the New York Times Crossword Puzzle

LEST

Wed, 24 Nov '21
Just in case
Sun, 31 Oct '21
Just in case
Wed, 21 Apr '21
Sci-fi sidekick ... or a hint to 42- and 53-Across
Sat, 3 Apr '21
Cautionary word
Thu, 25 Mar '21
Just in case
Fri, 12 Mar '21
To avoid the risk that
Sun, 10 Jan '21
In the event that