the word 'thriller' is a modern english formation, built upon the older verb 'thrill'. the verb 'thrill' originates from old english þyrlian, meaning "to pierce" or "to penetrate," which itself is derived from þyrel, meaning "hole." this etymological journey from a physical piercing to an emotional one is a classic example of semantic shift. the literal sense of piercing evolved metaphorically to describe a sensation that "pierces" or vibrates through one's emotions, hence the meaning "to cause a sudden wave of excitement or emotion." by adding the agent suffix '-er', the noun 'thriller' was created to denote a story or performance specifically designed to produce this thrilling, suspenseful effect in its audience, solidifying its meaning in the 19th century.

Structure: thrill (verb) + er (agent/instrument suffix) thrill: from old english þyrlian ("to pierce"), related to þyrel ("hole"). in this word, it functions as the verb root meaning "to cause a sharp, shivering sensation of excitement or emotion." er: from old english -ere, an agent suffix used to form nouns indicating a person or thing that performs an action. in this word, it forms a noun meaning "a thing that thrills."