Y symudiad allweddol?

Hwyl

Llŷr

From: Discussion of Welsh language technical terminology and vocabulary [mailto:[log in to unmask]] Ar ran/On Behalf Of Geraint Lovgreen
Sent: 30 November 2011 18:20
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Subject: crux (mynydda)

Sef -

Mountaineering the most difficult and often decisive part of a climb or pitch