illustrated

The word 'illustrated' originates from the Latin verb 'illustrare', meaning 'to light up, illuminate, make clear'. This verb itself is composed of the intensive prefix 'in-' ('upon') and 'lustrare' ('to make bright'), a derivative of 'lumen' ('light'). The core semantic journey is from the physical concept of casting light upon something to the metaphorical act of making a subject clear or enlightening the mind. In English, by the 16th century, it had developed its specific meaning of explaining via examples or pictures, with the adjectival use for publications containing such pictures becoming common in the 19th century. Thus, an 'illustrated' book is one upon which the 'light' of visual explanation has been cast.

Structure: il (in) + lustr (light) + ated (verb/adjective suffix) - il: A Latin prefix meaning 'in', 'into', or 'upon'. It is an assimilated form of 'in-' used before 'l'. - lustr: From Latin 'lustrare', meaning 'to illuminate, make bright, purify'. - ated: A suffix forming the past tense and past participle of verbs, or adjectives derived from them, from Latin '-atus'.