At one's wit's end and At a loss

At a loss and at one's wit's end are semantically related. In some cases you can replace phrase "At a loss" with "At one's wit's end", this phrases are similar.

At a loss adverb - Below cost.

At one's wit's end and at a loss are semantically related. Sometimes you can replace phrase "At one's wit's end" with "At a loss", this phrases are similar.