an arrow that is shot from a crossbow; has a head with four edges
an angry dispute; "they had a quarrel"; "they had words"
have a disagreement over something; "We quarreled over the question as to who discovered America"; "These two fellows are always scrapping over something"
a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants