You searched for: “lest
least, lest
least (LEEST) (adverb)
Used for stressing how small an item is or accenting how slight a quantity or degree can be: It is at least twice as cold today as it was yesterday.
lest (LEST) (conjunction)
1. Used to indicate fear that something private or negative will be discovered: Luis tiptoed into the house lest the children would hear him.
2. Used as an expression suggesting fear or worry: Martin was worried lest he lose his job because he was late two days in a row.

At the least suggestion of production cutbacks, the man started to worry lest he lose his position as manager.