Learn Dutch: Zij wurmde zich gisteren met moeite door de groep. - She squeezed herself through the group with difficulty yesterday.

You would replace door de groep with erdoorheen. When moving from one side of a physical space to the other, Dutch often adds heen to the preposition door. Combined with er (it), it forms erdoorheen. In a sentence, this usually splits: Zij wurmde zich er gisteren met moeite doorheen.

Is wurmde related to the English word "worm"?

Yes! The Dutch verb is zich wurmen, which literally means "to worm oneself." It requires the reflexive pronoun zich and is the natural way to say "to squeeze" or "to wiggle" your way through a tight spot.

Why are the phrases ordered as gisteren met moeite door de groep?

This follows the standard Dutch word order rule of Time-Manner-Place (TMP). We start with the time (gisteren), followed by the manner in which she did it (met moeite), and finally the place or direction (door de groep).

Could I use the adverb moeilijk instead of met moeite here?

Grammatically yes, but met moeite (with effort/difficulty) sounds much more natural in this context. Moeilijk often describes the general difficulty of a task, while met moeite emphasizes the actual physical struggle she experienced while squeezing through the crowd.