that
adjective
°The (thing) being indicated (at a distance from the speaker, or previously mentioned, or at another time).
noun
°(demonstrative) That thing.
°(relative) Which, who.
"Who was the actor that played Hamlet?"
verb
°(degree) To a given extent or degree; particularly.
"I'm just not that sick."
°So, so much; very.
"Ooh, I was that happy I nearly kissed her."