tawelfryd2000

tawelfryd 

[tawel+bryd1

eg. a hefyd gyda grym ansoddeiriol.

Tawelwch (meddwl, &c.):

equanimity, calmness (of mind).

1772 W d.g. Dispassionate [cool of temper, calm, moderate, &c.], Even of temper.