- ist (rare, popular, regional)
Not commonly used anymore outside of a literary and/or popular regional context; rather, the variant ăsta is used more often. Functions as a demonstrative adjective when used in front of a noun. Use ăsta when as a pronoun (or adjective/demonstrative as well, in which case it goes after the noun).
ăst student ― this student
astă femeie ― this woman