Word : gesundheit
interjection: Used to wish good health to someone who has sneezed.
From German Gesundheit (health), from gesund (healthy) + -heit (-hood). Earliest documented use: 1914.
“‘A friend was on an Aeroflot flight crossing Russia when the woman next to him sneezed. He said ‘Gesundheit!’ She said: ‘Thank goodness, someone who speaks English.'”
Peter Spencer; Column 8; The Sydney Morning Herald (Australia); Jul 23, 2011.