ladder
noun
[ ˈladə ]
• a piece of equipment consisting of a series of bars or steps between two upright lengths of wood, metal, or rope, used for climbing up or down something.
• a vertical strip of unravelled fabric in tights or stockings.
• "one of Sally's stockings developed a ladder"
ladder
verb
• (with reference to tights or stockings) develop or cause to develop a ladder.
• "I laddered my tights as I arrived this morning"
Origin:
Old English hlǣd(d)er, of West Germanic origin; related to Dutch leer and German Leiter .