| liǎo | clear |
| liào | to look afar from a high place |
| 瞭 | to watch from a height or distance to survey |
| 瞭哨 | to go on sentry duty to stand guard |
| 瞭望 | to watch from a height or distance to keep a lookout |
| 瞭望台 | observation tower lookout tower |
| 瞭望哨 | lookout post |
| 瞭望塔 | a watch tower; an observation tower |