...'s Achilles' heel
Noun
to be at a disadvantage
Verb
to have a weakness for sth
Verb
to catch someone on the hip
Verb
to be at sb's most vulnerable
Verb
to touch sb's tender spot
Verb
to touch a sensitive nerve in sb
Verb
to find sb's weak spot
Verb
to find sb's vulnerable spot
Verb
to pick a hole in sb's coat jacket
Verb
to rest a case on slender evidence
Verb
SWOT (Strengths, Weaknesses, Opportunities and Threats)
Management
to have a light character
Verb
to put one's finger on sb's weak spot
Verb
threadbare arguments
Noun
bare naked rare possibility