吾 (wú) is a classical Chinese first-person pronoun that corresponds to both 'I/my' (singular) and 'we/our' (plural). It is rarely used in modern spoken Chinese except in fixed literary phrases, idioms, formal writing, or historical contexts. You will encounter it in expressions like 吾日三省吾身 ('I daily examine myself thrice') and 吾辈 ('we; our generation'). In daily conversation, modern speakers use 我 (wǒ) and 我们 (wǒmen) instead.