the word unsurprised is a modern english formation built upon the older adjective 'surprised.' the core verb 'surprise' entered english in the late 15th century from middle french 'surprendre,' itself from latin 'super-' (over) and 'prehendere' (to seize), conveying the sense of being overtaken by an event. the old english prefix 'un-,' a common negator in germanic languages, is attached to negate the state, creating a term for the expected absence of the startled reaction. thus, the word logically constructs its meaning from the concept of not being seized or overcome by an unexpected occurrence.

Structure: un (not) + surprised (feeling surprise) un- is a prefix of Old English origin, meaning "not," used to form negatives of adjectives and participles. surprised is a past participle from the verb 'surprise,' derived from Middle French 'surprendre,' meaning "to overtake, seize."