The main goal of this paper is to reveal that Experiencer-Subject psych-verbs in Korean, which were once assumed to be simple, are in fact complicated, and that two types of Exp-Subj psych-verbs, [+/-transitive], behave not uniformly in several syntactico-semantic properties including causativity, relativization, nominalization, intensionality, and specificity. To highlight the complexity of Exp-Subj psych-verbs in Korean, I pursue a semantics-syntax correlation analysis where the second DP of the [-transitive] type is newly interpreted as inducing an abstract affixal postposition, CAUS, indicating causativity, while the second DP of the [+transitive] type is as inducing a "concealed" clausal complement indicating intensionality.