(rail transport) train

collision, crash / conflict of opinion

普通列車: (rail transport) local train, a train that stops at every station (abbr. 普通)

a tree; more specifically, a living tree / the bent and gnarled trunk or roots of an old tree / wood, lumber / something made of wood / in ancient China, a wooden musical instrument

(rail transport) local train, a train that stops at every station (abbr. 普通)

night train

bullet train

extraordinary train operated for Japanese emperor (tenno), empress, and/or empress dowager; royal train

to collide into, to collide with / to have a conflict with someone / (of opinions) to conflict

凸: convexity