Senses
那个/ 那個 that (demonstrative)
that one; that thing
那个/ 那個 umm
Used as a filler in speech when one is hesitant or searching for the right word, similar to "umm" or "you know".
那个/ 那個 so
Used before a verb or adjective for emphasis or exaggeration to mean "so" or "really".
那个/ 那個 that (euphemism)
Used to indirectly refer to something embarrassing, inappropriate, or difficult to say directly, such as menstruation, sex, or a person's questionable behavior
那个/ 那個 which
which one; who