| carthffosiaeth (b) | sewage |
| cefnwr (g) | full-back |
| chwys (g) | perspiration |
| croesawu | to welcome |
| cynllun (g) | plan |
| ehangu | to extend |
| enfys (b) | rainbow |
| galwad (g) | call |
| llygru | to pollute |
| peryglu | to endanger |
| sidydd (g) | zodiac |
| tanddaearol | underground |
| traddodiadol | traditional |
| twristiaeth | tourism |
| tymor (g) | term, season |
| wynebu | to face |