This is the 577th most frequent Thai word.
รวมท
It seems there might be a typo in the word "รวมท". If you meant "รวมทั้ง" (ruam-thang), it means "including" or "together with."
The word "รวม" in this sentence means 'to include' and indicates the act of bringing everyone into participation within the project context.
ฉันต้องการรวมทุกคนในโครงการนี้
I want to include everyone in this project.
Here, "รวม" is used in the sense of 'including,' defining the totality of participants to encompass the representatives from abroad.
จำนวนผู้เข้าร่วมทั้งหมดรวมถึงตัวแทนจากต่างประเทศด้วย
The total number of participants also includes representatives from abroad.
In this example, "รวม" is part of "รวมกัน" which means 'together,' signifying the act of gathering or doing an activity collectively.