treadle

nouns

a lever that is operated with the foot
foot lever, foot pedal, pedal, treadle

verbs

tread over
"the brick maker treadles over clay to pick out the stones"
treadle
is a type of (narrower)
tread or stomp heavily or roughly
"The soldiers trampled across the fields"
trample, tread
operate (machinery) by a treadle
treadle
is a type of (narrower)
handle and cause to function
"do not operate machinery after imbibing alcohol"; "control the lever"
control, operate