In Sapir's 1921 book also titled " Language ", he argued that instead of using the morphological types as a strict classification scheme it made more sense to classify languages as relatively more or less synthetic or analytic, with the isolating and polysynthetic languages in each of the extremes of that spectrum.
42.
Greenlandic is a polysynthetic language that allows the creation of long words by stringing together ergative, meaning that it treats ( i . e . case-marks ) the argument ( " subject " ) of an intransitive verb like the object of a transitive verb, but distinctly from the agent ( " subject " ) of a transitive verb.