Intro:

    A                C               D/B              G    G/F     G/E

E|---------0-------------0-----------------0-------------0-----0---------|
B|---------2p0-----------1-------------------3---3-------3-----3---------|
G|---------2-------------0---4--2--------------0-------------------------|
D|------2--2-------------2---------------0--------0----------------------| X2
A|----0----0----------3--3------------0h2--------------2-----2-----2-----|
E|-----------------------------------------------------3-----2-----0-----|

This intro is almost right.

Verse:

A        C         D/B          G  G/F  G/E
  tynnu nythod ar fy mehn trwy'r dydd
A        C         D/B          G  G/F  G/E
  pryd ddaw hyn i ben
A        C         D/B          G  G/F  G/E
  tynnu clychod ar fy mhen trwy'r dydd
A        C               D/B          G  G/F  E
pigo pigo pigo pigo ar fy mhen trwy'r dydd

Chorus:

E             Am
paid dweud y drefn
        D
nyth cacwn
              Am
paid dweud y drefn
        D
nyth cacwn
              Am
paid dweud y drefn
        D
nyth cacwn

Repeat intro

Verse:

tynnu nythod cacwn ar fy mhen pob awr or dydd
tynnu nythod cacwn ar fy mhen pob awr or nos
tynnu nythod cacwn ar fy mhen ac ar ben fy ffrindiau
tynnu nythod cacwn ar fy mhen ac ar ben fy nheulu i gyd

Chorus:
paid dweud y drefn
nyth cacwn
paid dweud y drefn
nyth cacwn
paid dweud y drefn
nyth cacwn