성실하다
To be diligent, faithful, and sincere in performing one's duties or tasks.
Examples
3 of 5그 학생은 출석이 매우 성실하다.
That student is very diligent in attendance.
성실한 태도가 성공의 비결입니다.
A sincere attitude is the secret to success.
연구 결과의 성실한 보고는 학자의 의무이다.
Faithful reporting of research results is a scholar's duty.
Word Family
Memory Tip
Seong (Sincerity) + Sil (Real). Being real and sincere.
Quick Quiz
그는 아무리 힘든 일이라도 끝까지 ______ 해낸다.
Correct!
The correct answer is: 성실하게
Examples
그 학생은 출석이 매우 성실하다.
everydayThat student is very diligent in attendance.
성실한 태도가 성공의 비결입니다.
formalA sincere attitude is the secret to success.
연구 결과의 성실한 보고는 학자의 의무이다.
academicFaithful reporting of research results is a scholar's duty.
우리 회사는 성실한 인재를 찾고 있습니다.
businessOur company is looking for diligent talents.
너 진짜 성실하게 산다.
informalYou really live a diligent life.
Word Family
Common Collocations
Common Phrases
성실 납세
faithful tax payment
성실 보고
sincere reporting
근면 성실
diligence and sincerity
Often Confused With
정직하다 is about being honest (not lying), while 성실하다 is about working hard and being reliable.
Usage Notes
A key personality trait often discussed in job interviews or school references.
Common Mistakes
Often translated only as 'honest', but it primarily means 'diligent/hard-working' in Korean.
Memory Tip
Seong (Sincerity) + Sil (Real). Being real and sincere.
Word Origin
From Sino-Korean 誠實 (Sincere-Real).
Grammar Patterns
Cultural Context
Confucian values in Korea place high importance on '성실' for social success.
Quick Quiz
그는 아무리 힘든 일이라도 끝까지 ______ 해낸다.
Correct!
The correct answer is: 성실하게
Related Grammar Rules
Related Vocabulary
More general words
균형
B2A state in which different things are in the correct or equal proportion. It refers to stability and harmony between opposing forces or elements.
기간
B1A length or portion of time during which something happens or exists.
고무적이다
B2To be encouraging, heartening, or inspiring. Used when a situation or news gives hope or motivation.
시의적절하다
B2To be timely or opportune; being appropriate for the current time or situation.
급격하다
B2To be sudden, rapid, or sharp. Used to describe a change that happens very quickly and with great intensity.
가시화하다
B2To make something visible or manifest, often referring to abstract ideas, plans, or problems becoming clearly observable.
고수하다
B2To strictly adhere to or maintain a position, principle, or opinion without changing it.
불가결하다
B2Absolutely necessary or essential; something that cannot be omitted or ignored for a specific purpose or state.
상세히
B1In a very detailed and thorough manner, leaving nothing out.
축소하다
B2To reduce or decrease the size, scope, or quantity of something. It is the opposite of expansion and is used widely in economics and management.
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