Polystyrene has 4 syllables and the stress is on the third syllable.
| # | Sentence | |
|---|---|---|
| 1. | We've insulated the house with expanded polystyrene foam panels, 100 millimetres thick. | |
| 2. | The New South Wales state government wants to ban many common plastic items, including straws, drinks stirrers and cutlery, as well as polystyrene cups in a bid to protect the environment and reduce waste. |