weakest link
nounEtymology
The figurative sense comes by metaphor from the literal sense: the notion that a chain is only as strong as its weakest link. (See historical details there.)
Definitions
The part of a system that is most likely to cause problems or fail.
The neighborhood
Vish — recursive loop
No curated loop yet for weakest link. Loops are being traced one word at a time while the ingestion pipeline matures.
sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA