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Use "declensional" in a sentence
"I agree that some of the words used might have been simple postpositions like '*-pi', while the others fully-fledged declensional cases."
"Indeed it is hard to imagine a language with just 4 declensional cases and without pre- or postpositions in the same time."
"In that case, mliθu and mliθuns would merely be two declensional forms of the same word and we'd no longer have an irritating hapax of mystery hampering our translation efforts."