more liable to break (6)
I believe the answer is:
weaker
(Other definitions for weaker that I've seen before include "Less powerful" , "More lacking in strength" , "Feebler, frailer" , "More powerless" , "More feeble or frail" .)
I believe the answer is:
weaker
(Other definitions for weaker that I've seen before include "Less powerful" , "More lacking in strength" , "Feebler, frailer" , "More powerless" , "More feeble or frail" .)