There are two possibilities for the original Early Semitic pictograph for this letter - , a picture of a fish and , a picture of a door. The modern Hebrew name for this letter is “dalet” and means “door”. The word “dalet” is a derivative of the parent root “dal” also meaning “door”. The Arabic name for this letter is “dal” giving support to the parent root as the original name. As the Hebrew word for a “fish” is dag, it is unlikely that the pictograph is the pictograph for this letter but, rather the pictograph .

The basic meaning of the letter is “door” but has several other meanings associated with it. It can mean “a back and forth movement” as one goes back and forth through the tent through the door. It can mean “dangle” as the tent door dangled down from a roof pole of the tent. It can also mean weak or poor as one who dangles the head down.

The sound for this letter is a “d” as in “door” as it is with the Greek and Arabic equivalents.

The Early Semitic pictograph evolved into the Middle Semitic letter . The Middle Semitic then evolved into the Late Semitic letter , the early form of the Modern Hebrew ד. The Middle Semitic letter is the origin of the Greek letter D, The Roman D and the number 4.