Alternation ‘Assume.position alternation’ (Coded)

This derives middle verbs with the meaning 'assume position X' from positionals meaning '(be in position) X'. Infinitives are generally formed by adding a diathetic prefix to the positional root. Argument structure of assume.positionals is one-place, just like the base positional, but the morphology of the verb is middle rather than intransitive, and it draws on a set of perfective inflections rather than the stative set used in positionals.