delicate.
other words for weak are feeble, frail, fragile, infirm, decrepit, debilitated.
delicate
fragile or frail
Fragile
fragile, subtle
Shiny, wet, fragile, clear, salty, gentle
a delicacy. Surely anything from a small cake to a piece of music.
Tactile, fragile, tensile, fertile, sterile.
The comparative form of "fragile" is "more fragile."
One synonym could be "delicate" (another could be flimsy).
Delicate, fragile, inactive, unskilled, or incapable. Those words are the opposite of efficient.
There are a variety of words that can be used to describe the flesh. These include soft, fragile, porous, hairy, as well as resilient.