coalesceதிரள்tiraḷ(teraḷu)(1 intr)form into a mass; gather together; clump or adhere together; merge, unite, join together, combine, fuse, mingle, blend; amalgamate, consolidate, integrate, homogenize, converge; come together into a group
Usage:
தங்களுடைய எண்ணங்கள் ஒத்துப் போனதால் இந்தக் குழுவினர் ஒன்றாகத் திரண்டார்கள்taṅkaḷuṭaiya eṇṇaṅkaḷ ottup pōṉatāl intak kuḻuviṉar oṉṟākat tiraṇṭārkaḷ
inda kuḻu iyarkeyaa avangaḷooḍa ottuppoona eṇṇattaale seendaanga
This group sort of coalesced by some natural process, because of their common beliefs.