yürüdün
Yürüdün is a Turkish verb meaning "you walked." It is the second-person singular past tense form of the verb "yürümek" (to walk). The suffix "-dün" indicates the past tense and the second-person singular subject. Therefore, "yürüdün" specifically refers to an action of walking performed by "you" in the past.
For example, in a sentence, "Sen dün parka yürüdün" translates to "You walked to the park yesterday."