The term 'possum' is the first-person singular present indicative form of the Latin verb 'posse', which means 'to be able' or 'can'. This verb is irregular, deviating from standard conjugation patterns that typical Latin verbs follow. Understanding 'possum' is essential for forming sentences that express capability or possibility in the present tense, and it serves as a key example of how irregular verbs function differently from regular ones in Latin.