한 사람의 생애 전체에 걸쳐 끊임없이 계속되거나 유지되는.
Lasting or remaining constant throughout the entire duration of a person's life.
예문:
"The two scientists shared a lifelong commitment to finding a cure for the disease."
"His lifelong passion for jazz music began when he heard his first record at age five."
"They maintained a lifelong friendship despite living on different continents."