a
  (rhagenw perthynol/relative pronoun):  - y dyn a welaist [gwelaist]; the man that you saw
  (geiryn gofynol/interrogative particle):  - A welaist y dyn [gwelaist]; did you see the man

a
  (cysylltiad/conjunction):  - ci a chath [cath]; dog and cat

â
  (arddodiad/preposition):  - ci â chath [cath]; dog with a cat

am
  (arddodiad/preposition):  - 'rwyf yn mynd am dro [tro]; I am going for a walk.

ar
  (arddodiad/preposition):  - 'rwyf ar goll [coll]; I am lost.


( mewn paratoad )