An essential feature of the gradual lodging (damaging, weakening) is the fact that the shape of the resulting pattern is longer period completely unnoticeable.
Isang mahalagang tampok ng unti-unti panuluyan (damaging, pagpapahina) pati na rin ang katotohanan na ang hugis ng nagreresulta na pattern na may mas mahabang oras unnoticeable.