Books by D. Geraint Lewis

A full list of adjectives that take comparison in Welsh. It includes some inflected forms which may not have seen the light of day before yet are still serviceable. It is aimed at advanced learners and Welsh speakers.

If knowing what preposition to use is causing you problems while writing in Welsh, here is an easy-to-use guide that includes chapters on: all the Welsh prepositions that conjugate; a comprehensive (bilingual) list of prepositional phrases; compound phrases; verbal prepositions.

This compact, paperback edition is the presentable and best-selling Welsh-English dictionary. It is a fully up-to-date, comprehensive and clear compact dictionary that is the ideal reference aid for learners and speakers of Welsh. It contains over 20,000 headwords, and irregular forms of adjectives, verbs and plural nouns are included.

A step-by-step guide to building your own Welsh sentences, with exercises and glossary. Reprint. First Published in March 2018.

A new edition of an alphabetical list of Welsh words that cause a mutation, and a summary of the main rules of mutation, together with an explanation of the grammatical terms used. First edition published in 1993.