noun
long-standing desire; long-held belief
Refers to a deeply held wish or conviction that one has harbored for a long time. Somewhat literary and not common in everyday conversation.
彼は長年の素意を遂げるために努力を続けた。
He continued his efforts to fulfill his long-standing desire.
その言葉には彼の素意が込められていた。
Those words were imbued with his long-held belief.