Leagtar amach sa pháipéar seo na céimeanna a leanadh le Corpas Foclóireachta na Gaeilge 2020 (CFG2020), corpas aonteangach 77.3 milliún focal, a thiomsú. Mínítear comhthéacs an tionscadail agus na riachtanais a spreag na cinntí a tógadh lena linn. Déantar cur síos ansin ar chéim an tiomsaithe agus ar na céimeanna próiseála. Tugtar spléachadh ar inneachar an chorpais, ar an acmhainn a cruthaíodh lena chuardach, agus ar an gcineál anailíse agus taighde a cumasaíodh leis seo. Tiomsaíodh CFG2020 ar an tuiscint gur réamhchéim é ar thionscadal níos leithne corpais, is ar an gcúis sin a dhéantar moltaí i dtaca lena fheabhsú agus lena mhéadú. [This paper sets out the steps followed in the compilation of Corpas Foclóireachta na Gaeilge 2020 (CFG2020), a monolingual 77.3 million word Irish-language corpus. The context and circumstances of the project are explained, along with the motivation for various decisions made. The compilation and processing stages are described in detail. The contents of the corpus are outlined and the resource created to query CFG2020 is presented, along with reference to the kinds of analysis and research which it enables. CFG2020 was created as a first step towards a proposed larger corpus project, and suggestions for improvement and expansion are therefore proposed.]