The Proto-Sinaitic Dalet (ד) is an ancient letter that originated in the earliest known alphabetic script, used in the Sinai Peninsula around the 19th century BCE. Its shape was likely inspired by a door or a tent flap, reflecting the meaning of “door” in Semitic languages. Over time, the Dalet evolved into the recognizable form found in later Phoenician and Hebrew scripts, but its original pictographic representation emphasized its functional and symbolic connection to entryways and passage.