This is the 13482nd most frequent Korean word.
라이더들과
"라이더들과" means "with riders" in English.
The word '라이더들과' is used as a plural noun referring to riders, with the '-들' indicating plurality and the '-과' (written as '-와' following a vowel) indicating 'with' in a conjunctive sense.
나는 라이더들과 함께 산에 올라갔다.
I went up the mountain with the riders.
Here, '라이더들과의' indicates possession or relation, showing the meeting that pertains to the riders and '과' also serves a conjunctive function.
라이더들과의 모임이 아주 즐거웠다.
The meeting with the riders was very enjoyable.
In this sentence, '라이더들과' is used similarly as in the first example, to signify engaging with a group of riders in conversation, again emphasizing plurality and conjunction.