Gwirwyd y dudalen hon
| cefnder (m.) | cousin (boy) |
| ceryddu | to chide, to punish |
| cist (f.) | chest |
| clôs (m.) | enclosure, yard |
| clwstwr (m.) | cluster |
| clystrau (m. pl.) | clusters |
| cnwd (m.) | crop |
| coeth | pure, elegant |
| cofrestrydd (m.) | registrar |
| corfannau (m. pl.) | metrical feet |
| corwynt (m.) | hurricane |
| cotwm (m.) | cotton |
| crasu | to bake, to air (clothes) |
| crefft (f.) | profession, trade |
| cregyn (f. pl.) | shells |
| crochan (m.) | cauldron |
| croesaw (m.) | welcome |
| crombil (m.) | gizzard, heart, bowels (figuratively) |
| crud (m.) | cradle |
| crwban (m.) | turtle |
| cydradd | equal |
| cydymdeimlad (m.) | sympathy |
| cyfaddas | suitable |
| cyfamod (m.) | pact, agreement |
| cyfandir (m.) | continent |
| cyfarwyddid (m.) | direction, guidance |
| cyfnewidiadau (m. pl.) | changes |
| cyfnither (f.) | cousin (girl) |
| cyfnos (m.) | twilight |
| cyfran (f.) | share |
| cyfrinach (f.) | secret |
| cyhydedd (m.) | equator |
| cylchynion (m. pl.) | surroundings, environment |
| cymell | to persuade |
| cymhelri (m.) | tumult |
| cynhyddu | to increase |
