不衰 | bù shuāi | unfailing / never weakening / enduring / unstoppable | |
如火如荼 | rú huǒ rú tú | like wildfire (idiom) / unstoppable | |
锐不可当 | ruì bù kě dāng | unstoppable / hard to hold back | |
遏止 | è zhǐ | to hold back / to check (i.e. to stop sb's advance) / to resist / esp. with negative, irresistible, unstoppable etc |