the word 'theism' is a modern construction built from classical greek components. it combines 'theos', meaning a god or deity, with the suffix '-ismos', which denotes a practice, system, or distinctive doctrine. this formation followed the model of other philosophical and religious terms like 'deism' and 'atheism'. the term was coined in the 17th century to specifically denote belief in a personal, intervening god, distinguishing it from the more detached, philosophical creator of deism, thus providing a precise label for a core concept in theological discourse.

Structure: the (god) + ism (belief system) the: from greek 'theos' (god). serves as the root conveying the core concept of deity. ism: from greek suffix '-ismos', forming nouns of action or belief. serves as a suffix indicating a distinct system, doctrine, or practice.