tú shǒu huà
freehand drawing
徒
tú
(bound form) disciple; apprentice; believer; (derog.) wrongdoer (as in 騙徒|骗徒[pian4 tu2] "swindler" or 叛徒[pan4 tu2] "traitor" etc)
手
shǒu
hand
画
huà
to draw; to paint