Questions & Answers about Mężczyzna zamilkł i zamknął oczy.
How does the prefix za- in zamilkł relate to our current lesson on starting actions?
The base verb milczeć means "to be silent" (an ongoing state). By using the prefix za- (often paired with the suffix -nąć), we get the perfective verb zamilknąć, which specifically focuses on the sudden onset of that state. It shifts the meaning from "being silent" to "falling silent".
The infinitive is zamilknąć. Why is the past tense form zamilkł instead of zamilknął?
Wait, if that rule applies to zamilkł, why does zamknął keep the -ną- syllable?
The dropping of -ną- depends heavily on the historical root of the word, so there are exceptions. While zamilknąć drops it, zamknąć (to close) is a verb that retains the nasal vowel in the past tense. Just remember that the vowel shifts depending on gender: it is zamknął for a masculine subject, but zamknęła for a feminine one.