* Formal: "The researcher's questions seemed innocuous, but they were designed to elicit sensitive information."
* Informal: "I tried to make an innocuous comment about the weather, but somehow it ended up starting a debate."
* Descriptive: "The old woman's smile was innocuous, but her eyes held a wisdom that belied her simple demeanor."
* Contrasting: "While the movie's plot was innocuous, its special effects were stunning."
Let me know if you'd like to see more examples or have a specific scenario in mind!