This paper attempts to clarify the meaning of the Hebrew word tard?m? by analyzing the Masoretic and Septuagint texts that contain this word. This work encourages the readers to contemplate whether tard?m? in Gen. 2:21 acts as an agent of God in the creation of His humankind or simply signifies deep sleep in a physiological sens. So far, the commentators generally interpreted the three Hebrew words concerning sleep(t?num?, ??n?, and tard?m?, and their nominal forms) as a depth or stage of sleep. Recently some commentators define tard?m? as the first sleep in a physiological perspective. However, the idiomatic usages and parallel phrases of these words indicate that the above understanding of tard?m? is very simplistic. This argument is strengthened by considering that the Masoretic and Septuagint texts use these words figuratively with supernatural connotation. This study compares the three words on sleep, analyzes the relationship between sleep and death that appear in the Hebrew Bible and Greek myths, and considers the usages of tard?m? in the Septuagint. It is notable that the Septuagint uses 9 different words in order to translate the same word tard?m? that appears 11 times in the Hebrew Bible. It implies that the readers at that time tried to interpret tard?m? in the figurative and symbolic manner according to the context to which this word belongs. Our study will leads the readers to the fact that ‘deep sleep’ in the Hebrew Bible is not merely the physiological first sleep, but the place where God works and the human experience that enables his participation in divine creation.