Rung has 6 different meanings across 2 categories:
Noun · Proper Noun
a crosspiece between the legs of a chair
one of the crosspieces that form the steps of a ladder
A crosspiece forming a step of a ladder; a round.
past participle of ring (only in senses related to a bell)
Of a pig: having a ring through the nose.
A surname.
The word "rung" comes from Old English hrung. It originally meant a pole or stanchion.