'teaser' originates from English, specifically the word 'tease' with the agent-forming suffix '-er', where 'tease' originally meant 'to pluck apart (fibers)' and later 'to provoke or make fun of.'

'teaser' changed from the Middle English verb forms such as 'tesen'/'teasen' (related to pulling apart fibers) to the verb 'tease' and then acquired the agent suffix '-er' to form the noun 'teaser' in modern English.

Initially, it meant 'to pluck apart (fibers)' and later evolved to mean 'to provoke or irritate'; over time the noun 'teaser' developed senses including 'one who teases', 'a short promotional clip', and 'a puzzling question.'