This paper titled, ‘a descriptive analysis of suffixation in the Ídóma language’ described suffixation in the language, to ascertain the role of suffixation and how it affects meaning in the language. Data for the study were collected through interview with competent native speakers of Idoma from Ọtukpo Local Government. The researcher used her intuitive knowledge as a native speaker of Ídóma to validate the data. Data for the study were presented in rows, featuring the Ídóma lexemes with a Leipzig’s one-to-one correspondence glossing in English for a clear understanding. The data were analyzed based on the objectives of the study. The study adopted the theory of Construction Morphology. It discovered that the Ídóma language features suffixation processes, which include: -kum, ‘my’,- m, ‘my’, -nu, ‘his’ etc. The study also discovered that these suffixes are inflectional which are used in indicating possession in Ídóma; while others are derivational, such as –lum, ‘me’ and –n,’not’ these are used to expand the meaning of lexemes. The study found out that the suffix -n is used for deriving negations of verbs in Ídóma. It recommends that more work in Ídóma language morphology should be done to enrich its structure. The study contributes a formal linguistic analysis of suffixation in Ídóma to the body of literature in Ídóma language.