t1=d1=f1=v1 is a board for use in water/(wind/kite)surfingboard/bodyboard/wakeboard of material/property t2.
From tanbo, djacu, falnu, vofli (f2, f3, v2 subsumed). See also sufingboard (=bonjacta'o), windsurfingboard (=fanjacta'o), wakesurfingboard (=blobonjacta'o).