Hendiadys

Hendiadys () is a figure of speech used for emphasis where a phrase and its qualifier is replaced by two phrases separated by the conjunction "and." For example, the phrase "by a long siege" may be converted to "by length of time and siege" (note how the adjective "long" becomes a noun: "length of time"). Hendiadys, in English, is also known as two for one and figure of twins. Although the underlying phrase is Greek (Ancient Greek: ἓν διὰ δυοῖν, romanized: hen dia duoin, lit. 'one through two'), the only other forms occasionally found in English are hendiaduo and hendiaduous, the latter of which the 17th-century English Biblical commentator Matthew Poole used in his commentary on Genesis 3:16, Proverbs 1:6, and Isaiah 19:20.