‘Casglfa Ddirfawr o Eiriau Cymraeg, Henion a Newyddion’: Geiriadur Thomas Wiliems, Trefriw (c.1545–1622/3) yn LlGC Peniarth 228

Key Points

• The geiriadur is a significant linguistic contribution, showcasing both old and new Welsh words.
• It serves as a critical resource for understanding the evolution of the Welsh language.
• Documentation includes terms from various domains, indicating cultural and linguistic richness.
• This work highlights the importance of preserving historical linguistic artifacts.