niweidio

Yn gyntaf, gall newidiadau aml neu aneglur i gyfraith dreth niweidio hyder buddsoddwyr; maen nhw'n atal cynllunio tymor hir.

Firstly, frequent or unclear changes to tax law can damage investor confidence; they deter long-term planning.

C1

Po hiraf y caniateir iddo barhau, y mwyaf o gŵn fydd yn cael eu niweidio neu eu lladd.

The longer it's allowed to continue, the more dogs will be harmed or killed.

B2

Y cyntaf yw fy mod i'n berchen ar filgi a fu'n rasio yn y gorffennol, ac, yn amlwg, fe gollon ni Arthur, a oedd wedi'i niweidio'n benodol ac rydym ni'n gwybod ei fod wedi'i anafu trwy rasio milgwn.

The first is that I'm the owner of a former greyhound who raced, and, obviously, we lost Arthur, who was particularly damaged and we know was hurt through greyhound racing.

B2