Out of sight and Ultraviolet

Out of sight adjective - Not accessible to view.

Ultraviolet and out of sight are semantically related. In some cases you can use "Ultraviolet" instead an adjective phrase "Out of sight".

Ultraviolet adjective - Having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end.

Out of sight and ultraviolet are semantically related. Sometimes you can use "Out of sight" instead an adjective "Ultraviolet".