과

with, alongside someone or something

Same little tag as the "and" 과, but here it names a companion rather than joining a list: 친구들과 제주도에 갔어요 is "I went to Jeju with my friends", 선배님과 함께 is "together with you", 자막과 함께 보실 수 있어요 is "you can watch it with subtitles". The word 함께 ("together") very often follows and is the clearest signal you are looking at this use rather than the list-joining one. It goes on consonant-ending nouns; vowel-ending nouns take 와. Casual speech prefers 하고 or 랑 for the same idea.

Register: slightly formal or written-leaning