obstruction   
aham-baravarana
An obstruction in the door-way [Richardson 1885]
fangoka
in the provinces, both in the root and derivatives, it means an obstruction, an impediment, physical or moral. [Richardson 1885]
hararo
obstruction, encumbrance, prevention, discouragement, obstacle, impediment, dissuasion, (prov. ?) [Richardson 1885]

obstruction   
fahatsentsenana
obstruction [SLP 1986]