Delicate; weak (5)
I believe the answer is:
frail
I believe this is a double definition.
'delicate' is the first definition.
(similar in meaning)
'weak' is the second definition.
(similar in meaning)
(Other definitions for frail that I've seen before include "Puny" , "Weak, feeble" , "Basket made of rushes" , "Weak and infirm" , "rush" .)