funambulist
A tightrope walker or a similar performer on a slack rope.
A female funambulist, Maria Spelterini, on various occasions tightrope-walked across the Niagara Gorge with peach baskets on her feet, blindfolded, or manacled.
Where it comes from
From French funambule or its source, Latin funambulus, from funis (“rope”) + ambulare (“walk”).
Adapted from the Wiktionary entry funambulist (CC BY-SA 4.0).