乗り込む
のりこむ · norikomu · JLPT N1 · verb-godan
to board
🚗 乗 = ride/board + 込む = crowd into; to crowd in and get on
乗る (noru) means to ride or board, and 込む (komu) means to crowd into or push in. Together they describe getting on or into a vehicle, or marching into a place.