serpent

The word "serpent" entered English via Old French from the Latin serpēns, which is the present participle of the verb serpere, meaning "to creep or crawl." This Latin root can be traced further back to the Proto-Indo-European root serp-, also meaning "to crawl, creep." The literal meaning, "a creeping animal," directly gave rise to its primary modern sense for a snake. The secondary, figurative meaning of a deceitful person evolved from the ancient symbolic association of snakes with cunning and danger, as seen in biblical and mythological narratives.

Structure: serp (to creep) + ent (agent suffix) - serp: From Latin serpēns, the present participle of serpere meaning "to creep, crawl." Its functional role is the core root conveying the concept of slithering movement. - ent: A suffix of Latin origin (-entem, accusative of -ēns), forming agent nouns or adjectives. In this word, it functions to create a noun meaning "a creeping thing."