ladder (
http://definr.com/ladder)
n 1: steps consisting of two parallel members connected by rungs;
for climbing up or down
2: a row of unravelled stitches; "she got a run in her
stocking" [syn:
run,
ravel]
v : come unraveled or undone as if by snagging, of stockings;
"Her nylons were running" [syn:
run]