(By Hannah J. Haynie): "Noun incorporation is defined as a construction where obligatorily bare (i.e. articleless, numberless, modifierless) nouns must occur adjacent to or inside of the verb, in a fixed order. This feature essentially asks whether transitive verbs may be rendered intransitive by means of noun incorporation, and whether this process is productive. This need not be the default way of intransitivizing verbs, but the process must be productive. The incorporated noun in the construction of interest for this feature is semantically an argument of the verb. For example: he was painting the bike = he was bike-painting. Noun incorporation where the relevant noun functions as an adjunct or modifier does not count, e.g. she was running like Jacob runs = she was Jacob-running. A construction where it is necessary to overtly represent the relevant argument with an additional form other than the incorporated noun, for example with a pronoun, also does not count."
In the Grammaticon's "incorporation", the noun must be an argument of the verb, too, though the construction may be unproductive. The noun is "obligatorily bare" because the Grammaticon defines incorporation as a construction with an unexpandable noun root adjacent to a verb root. But verbs with an incorporated noun in P-argument function may (cross-)index the noun.