unstressed (adjective)

1. In the phrase 'I believe in God', the word 'in' is an unstressed preposition.

2. The word 'but' is often an unstressed conjunction in cartoon dialogues.

3. In the sentence 'The wizard cast a spell', the word 'a' is an unstressed article.

4. The word 'of' is typically an unstressed preposition in the context of art composition.