chink in armor

deficiency failing flaw fragility frailty gap instability lack lapse shortcoming vulnerability

appetite blemish debility decrepitude delicacy enervation faintness fault feebleness fondness impairment imperfection impotence inclination inconstancy indecision infirmity invalidity irresolution languor liking passion penchant powerlessness predilection proclivity prostration senility taste vice vitiation

Achilles heel soft spot sore point

advantage perfection strength strong point success

ability health robustness soundness

deficiency flaw fragility imperfection shortcoming soft spot vulnerability

Achilles heel appetite blemish debility decrepitude delicacy enervation failing faintness fault feebleness foible fondness frailty gap impairment impotence inclination inconstancy indecision infirmity instability invalidity irresolution lack languor lapse liking passion penchant powerlessness predilection proclivity prostration senility sore point taste vice vitiation

perfection