Lacking strength, intensity, or firmness
Encoding Strategies:
linguistic

debilitated
weakened
Débil means weak and is related to the English word debilitated0, since someone who is debilitated is weak.
débil
weak, feeble
Lacking physical strength or vigor.
Después de la operación se sentía muy débilAfter the operation he felt very weak
El anciano estaba tan débil que apenas podía caminarThe old man was so feeble that he could barely walk
weak, weak-willed (character)
A weak will: someone who gives in easily.
Es demasiado débil para decir que noHe's too weak to say no
Tiene un carácter débil y siempre cedeHe has a weak-willed character and always gives in
weak, faint, dim (signal, light, sound)
A signal or light that has lost its strength comes through weak and faint.
La señal del wifi es muy débil en mi cuartoThe wifi signal is very weak in my room
Solo se veía la luz débil de una velaOnly the dim light of a candle could be seen
weak, flimsy (argument, excuse)
An argument with no strength to stand on is weak and unconvincing.
Su excusa era demasiado débil para convencer a nadieHis excuse was too weak to convince anyone
El fiscal presentó un caso débilThe prosecutor presented a flimsy case