The phrase "weakest element" refers to the part or aspect of something that is the least strong or least effective. It usually signifies the part that is most vulnerable or susceptible to failure. Full definition
What we are left with is a solid show, weighed down by weaker elements. (londonist.com)
The report on impacts of climate change — one of three main sections of each of the panel's periodic assessments — has long been seen by some climate scientists, including some participants in the I.P.C.C. process, as a relatively weak element in the overall effort, in part because it has less scientific literature to draw on. (dotearth.blogs.nytimes.com)
Weaker elements include a filler chapter on education reform, and a one - sided screed about YouTube and Spotify that could have been written by the entertainment industry. (fortune.com)