MuNACH-l’garMEH is a double-symbol ta’am with the munNACH under the first letter of the accented syllable and a vertical line following the word. It occurs only in a muNACH-r’VIa phrase. Sometimes you’ll see a vertical line after words punctuated with other te’amim. In this case, it’s called a paSEK, and it is meant to indicate a slight emphatic pause in the reading.