the.com/susceptibility
The open door your defenses forgot to lock, waving everything inside.
means The state of being easily affected, harmed, or influenced by something — a weakness toward a particular force.
from From Latin suscipere, to take up or receive, via susceptibilis, capable of being taken — you, generously receiving the universe's punches.
Medical senseGenetic susceptibility raises disease odds, not certainty.
Plural twistSusceptibilities means tender feelings easily offended.
Physics useMagnetic susceptibility measures how readily material magnetizes.