r (non-gloss definition|Used as an expletive subject of (term|be#Verb|be) in its sense of “exist”, with the semantic, usually indefinite subject being postponed or (occasionally) implied.)
r (non-gloss definition|Used with other intransitive verbs of existence, in the same sense, or with other intransitive verbs, adding a sense of existence.)
r (non-gloss definition|Used with other verbs, when raise#Verb | raised.)
r (context|in combination with certain prepositions|no longer productive)that|That.
r (colloquial)(non-gloss definition|Used to replace an unknown name, principally in greetings and farewells)