case suffix (consonant) suffix (vowel) usage
agentive marks the subject in transitive sentences, and volitional subject in intransitive sentences
ergative -ir -ir (fusional)  
patientive -om -m marks the directly impacted object in transitive sentences, and involitional subject in intransitive sentences
accusative -s -s marks the non-impacted objects, also used for place, time, etc.
genitive -el -gel attributive form for nouns