to knock against; to bump into; to have a disagreement; to clash

(onom.) knocking

(dialect) ugly; unsightly; shabby; (dialect) to humiliate; to ridicule

(slang) to revel in the sight of one's favorite couple being affectionate; to lap it up when one sees a couple whom one ships kissing or cuddling

to kowtow (traditional greeting, esp. to a superior, involving kneeling and pressing one's forehead to the ground)

(coll.) to fight to the death

(onom.) knocking