O nerthoedd mawr y bythol Iôr

O nerthoedd mawr y bythol Iôr!
  Plyg anian ger ei fron;
Ei air yw deddf yr eang fôr,
  A'i amnaid ddofa'r don.

Wrth swn ei droed y brynia ffy,
  I geisio cuddio'u pen;
Gan ryfodd rym ei gorwynt cry'
  Y sigla seiliau'r nen.

Fy enaid cais ei nawdd mewn pryd,
  Rhag suddo yn y lli';
Trwy ganol blin
    ryferthwy'r byd,
  Ei fraich a'th gynal di.

O great strengths of the everlasting Lord!
  Nature bows before him;
His word is the law of the wide sea,
  And his gesture tames the wave.

At the sound of his feet the hills flee,
  To try to hide their head;
By his strong whirlwind's amazing force
  The foundations of the heavens shakes.

My soul, seek his refuge in time,
  From sinking in the flood;
Through the middle of the grievous
    tempest of the world,
  His arm shall support thee.