Dyirbal actually has only four places of articulation for the stop and nasal consonants—this is fewer than most other Australian Aboriginal languages, which have six. This is because Dyirbal lacks the dental/alveolar split typically found in these languages. Like the majority of Australian languages, it does not make a distinction between voiced consonants (such as b, d, g, etc.) and voiceless consonants (the corresponding p, t, and k, etc. respectively). Standard orthography uses voiced consonants, which seem to be preferred by speakers of most Australian languages since the sounds (which can often be semi-voiced) are closer to English semi-voiced b, d, g than aspirated p, t, k.
The Dyirbal vowel system is typical of Australia, with three vowels: /i/, /a/ and /u/, though /u/ is realised as [o] in certain environments and /a/ can be realised as [e], also depending on the environment in which the phoneme appears. Thus the actual inventory of sounds is greater than the inventory of phonemes would suggest. Stress always falls on the first syllable of a word and usually on subsequent odd-numbered syllables except the ultima, which is always unstressed. The result of this is that consecutive stressed syllables do not occur.
| Bilabial | Alveolar | Alveo-Palatal | Retroflex | Velar | |
| Stops | p | t | c | k | |
| Nasals | m | n | ɲ | ŋ | |
| Lateral | l | ||||
| Trill | r | ||||
| Flap | ɽ | ||||
| Approximants | j | w |
The class usually labeled "feminine" (II), for instance, includes the word for fire and nouns relating to fire, as well as all dangerous creatures and phenomena. This inspired the title of the George Lakoff book Women, Fire and Dangerous Things. Some linguists distinguish between such systems of classification and the gendered division of items into the categories of "feminine", "masculine" and (sometimes) "neuter" that is found in, for example, many Indo-European languages.
Dyirbal shows a split-ergative system. Sentences with a first or second person pronoun have their verb arguments marked for case in a pattern that mimics nominative-accusative languages. That is, the first or second person pronoun appears in the least marked case when it is the subject (regardless of the transitivity of the verb), and in the most marked case when it is the direct object. Thus Dyirbal is morphologically accusative in the first and second persons, but morphologically ergative elsewhere; and it is still always syntactically ergative.