citadel - Dictionary definition and meaning for word citadel
cita(Seeta) was captured by Ravana and was confined to his fortress with all his sena del(dal) protecting her...
cita-del is similar to city -Delhi in India which has many old fortress.
Seetha+ dwell= seetha mathaâ€™s dwellind place is fortess.
citadel ,,,remind us with CASTLE which has the same meaning =D
sit+idle..or tadel(TIDEl)..so to avoid destruction from tides , go for shelter in bastions. :)