외유내강이 · 외유내강을
gentle on the outside, strong on the inside
Example
우리 팀장님은 부드럽지만 강한 외유내강형 리더예요.
Our team leader is gentle but strong — soft outside, tough inside.
Word parts
외 outside+유 soft+내 inside+강 firm
Literally 'soft outside, firm inside'.
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