Hole-and-corner and Sub rosa

Hole-and-corner adjective - Undertaken or done so as to escape being observed or known by others.

Sub rosa and hole-and-corner are semantically related. In some cases you can replace phrase "Sub rosa" with "Hole-and-corner", this phrases are similar.

Sub rosa adverb - In secret or covertly.

Hole-and-corner and sub rosa are semantically related. Sometimes you can use "Hole-and-corner" instead an adjective phrase "Sub rosa".