How about the Ish/Isha one. The Hebrew word for man (Ish) is spelled Aleph, Yud, Shin. The word for woman (Isha) is spelled Aleph, Shin, Heh. If you take the Yud from Isah and the Heh from Isha and put them together, you spell a Name of Hashem (Kaw), and this serves to remind us that when man and woman come together in kedusha, that the Shechina rests with them, and Hashem must always be part of a Jewish home. As soon as the Yud and Heh are removed, however, when there is no sign of Hashem in a Jewish household, all that remains is the Aleph-Shin or Aish (fire).
