still; not yet
まだ indicates that a state or action continues up to the present (still) or that something expected has not happened (not yet).
まだ is a common adverb meaning 'still' or 'not yet'. When used with positive verbs or adjectives, it means that something is still happening or a state continues. For example, 'まだ働いています' means 'I am still working'. When used with negative verbs (verbs in the negative form), it means 'not yet', indicating that something has not happened up to now: 'まだ食べていません' means 'I have not eaten yet'.
A key point is that まだ often appears with the negative form to express 'not yet', and with affirmative forms to express 'still'. It is used in both conversation and writing, and is completely natural in everyday speech. It is an N5-level word, so you will use it often.
Be careful: まだ does not change form. It is placed right before the word it modifies, usually the verb at the end of the sentence.