橹 櫓 lu3
scull (single oar worked from side to side over the stern of a boat) (free word)

strokes 19
radical
木
木
strokes after radical 15
楼橹 樓櫓 lou2 lu3
watch tower; movable battlefield turret

摇橹 搖櫓 yao2 lu3
to scull (with a single oar, usually mounted on the stern of the boat)

摇橹船 搖櫓船 yao2 lu3 chuan2
boat propelled by a yuloh (a single sculling oar)