to be on foot

futile

(bound form) disciple; apprentice; believer; (derog.) wrongdoer (as in 騙徒|骗徒[pian4 tu2] "swindler" or 叛徒[pan4 tu2] "traitor" etc); (bound form) on foot; (bound form) bare; empty; (bound form) to no avail; in vain; (bound form) merely; just; only; (bound form) prison sentence

surname Tu

with bare hands; unarmed; fighting hand-to-hand; freehand (drawing)