lance

lance (CUT) Show phonetics
verb [T]
to cut the skin with a sharp tool in order to release infected matter that has collected under it:
She had a boil lanced at the doctor's this morning.

lance (WEAPON) Show phonetics
noun [C]
a long thin pole with a sharp point which soldiers used in the past as a weapon when riding horses

lancer Show phonetics
noun [C]
a soldier who belongs to the part of an army that used lances in the past:
the Queen's Royal Lancers