Definition
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er mwyn
Mae 'er mwyn' yn golygu gwneud rhywbeth ar gyfer rhywun neu rywbeth arall, yn aml i roi budd neu les.
The phrase 'er mwyn' means to do something for someone or something else, often to provide benefit or welfare.
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Rwy'n gweithio'n galed er mwyn helpu fy nheulu.
I work hard for the sake of helping my family.
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Mae hi'n llunio'r cynllun er mwyn sicrhau llwyddiant y prosiect.
She is drafting the plan for the sake of ensuring the project's success.
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Gwnes i'r penderfyniad er mwyn diogelu'r amgylchedd.
I made the decision for the sake of protecting the environment.